{"id":5427,"date":"2026-09-14T09:29:45","date_gmt":"2026-09-14T09:29:45","guid":{"rendered":"https:\/\/wolorin.com\/?p=5427"},"modified":"2026-09-14T09:29:45","modified_gmt":"2026-09-14T09:29:45","slug":"gravure-esa-impression-roll-problems","status":"publish","type":"post","link":"https:\/\/wolorin.com\/es\/blog\/gravure-esa-impression-roll-problems\/","title":{"rendered":"Gravure ESA Impression Roll Problems"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"5427\" class=\"elementor elementor-5427\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6de07ebe e-flex e-con-boxed e-con e-parent\" data-id=\"6de07ebe\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-4baeff22 e-con-full e-flex e-con e-child\" data-id=\"4baeff22\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-322681eb e-con-full e-flex e-con e-child\" data-id=\"322681eb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3835623b elementor-widget elementor-widget-heading\" data-id=\"3835623b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Gravure ESA Impression Roll Problems<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-50411878 e-con-full e-flex e-con e-child\" data-id=\"50411878\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-450599b8 e-con-full e-flex e-con e-child\" data-id=\"450599b8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2dbe497f elementor-widget elementor-widget-text-editor\" data-id=\"2dbe497f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Weak electrostatic assist often appears first as a printing change. Fine image areas develop more missing dots, one band across the web transfers less cleanly, or the improvement normally seen with ESA on becomes noticeably smaller.<\/p><p>Arcing and changing resistance give stronger location clues. Pay particular attention when either starts after the impression roll has been ground, worn down, re-covered, or replaced.<\/p><p>A few comparisons usually narrow the direction quickly: Does the print change when ESA is switched on and off? Does a weak area stay at the same position across the roller face? Does an arcing point follow the roller as it turns, or stay fixed on the machine?<\/p><p>ESA helps ink transfer from the gravure cells at the print nip. Missing dots can also come from blocked cells, ink condition, substrate contact, or mechanical impression. If the defect changes very little with ESA on and off, continue with the broader\u00a0<a href=\"https:\/\/wolorin.com\/es\/blog\/gravure-missing-dots-ink-transfer\/\">gravure missing dots and ink transfer checks<\/a>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5ee013 e-con-full e-flex e-con e-child\" data-id=\"5ee013\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6b603384 elementor-widget elementor-widget-image\" data-id=\"6b603384\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"800\" height=\"600\" src=\"https:\/\/wolorin.com\/wp-content\/uploads\/2026\/05\/Assorted-Rubber-Roller-Batch.webp\" class=\"attachment-large size-large wp-image-4037\" alt=\"lote surtido de rodillos de caucho\" srcset=\"https:\/\/wolorin.com\/wp-content\/uploads\/2026\/05\/Assorted-Rubber-Roller-Batch.webp 800w, https:\/\/wolorin.com\/wp-content\/uploads\/2026\/05\/Assorted-Rubber-Roller-Batch-300x225.webp 300w, https:\/\/wolorin.com\/wp-content\/uploads\/2026\/05\/Assorted-Rubber-Roller-Batch-768x576.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"  title=\"Gravure ESA Impression Roll Problems\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-39d65e5 e-flex e-con-boxed e-con e-parent\" data-id=\"39d65e5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-93015e9 elementor-widget elementor-widget-html\" data-id=\"93015e9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\n.wl-a11{font-family:Inter,Arial,sans-serif;color:#2f3f50;font-size:16px;line-height:1.72;background:#fff}.wl-a11 *{box-sizing:border-box}.wl-a11 .wl-wrap{max-width:1180px;margin:0 auto;padding:58px 42px}.wl-a11 h1,.wl-a11 h2,.wl-a11 h3{color:#153a63;margin:0 0 20px;line-height:1.16}.wl-a11 h1{font-size:42px;font-weight:700}.wl-a11 h2{font-size:32px;font-weight:700;padding-top:8px}.wl-a11 h2+*{margin-top:0}.wl-a11 h3{font-size:22px;font-weight:700;margin-top:34px}.wl-a11 p{margin:0 0 18px}.wl-a11 ul,.wl-a11 ol{margin:0 0 22px;padding-left:24px}.wl-a11 li{margin:7px 0}.wl-a11 a{color:#1565c0;text-decoration:none}.wl-a11 a:hover{color:#f4b938}.wl-a11 strong{font-weight:700;color:#243c55}.wl-a11 .wl-table{overflow-x:auto;margin:26px 0 30px;border:1px solid #dde5ec;border-radius:10px}.wl-a11 table{width:100%;border-collapse:collapse;min-width:680px}.wl-a11 th{background:#153a63;color:#fff;font-weight:700;text-align:left}.wl-a11 th,.wl-a11 td{padding:13px 15px;border:1px solid #dde5ec;vertical-align:top}.wl-a11 tbody tr:nth-child(even){background:#f7f9fb}.wl-a11 blockquote{margin:24px 0;padding:18px 22px;border-left:4px solid #f4b938;background:#f6f8fa}.wl-a11 pre{white-space:pre-wrap;background:#153a63;color:#fff;padding:22px;border-radius:10px;overflow:auto}.wl-a11 code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.wl-a11 .wl-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:42px;align-items:center;background:#f5f7f9}.wl-a11 .wl-hero-media{background:#fff;border:1px solid #dde5ec;border-radius:12px;padding:14px}.wl-a11 .wl-hero img{width:100%;aspect-ratio:4\/3;object-fit:cover;border-radius:8px;display:block}.wl-a11 .wl-section{border-top:1px solid #edf1f4}.wl-a11 .wl-section h2:not(:first-child){margin-top:58px;padding-top:42px;border-top:1px solid #edf1f4}.wl-a11 .wl-cta{background:#f4f6f8}.wl-a11 .wl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}.wl-a11 .wl-btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:6px;background:#f4b938;color:#153a63!important;font-weight:700}.wl-a11 .wl-btn:nth-child(even){background:#fff;border:1px solid #cfd9e3}.wl-a11 .wl-btn:hover{background:#153a63;color:#fff!important}\n@media(max-width:767px){.wl-a11 .wl-wrap{padding:38px 22px}.wl-a11 .wl-hero{grid-template-columns:1fr}.wl-a11 h1{font-size:33px}.wl-a11 h2{font-size:27px}.wl-a11 h3{font-size:21px}.wl-a11 .wl-hero-media{order:2}.wl-a11 .wl-section h2:not(:first-child){margin-top:42px;padding-top:32px}}\n<\/style><article class=\"wl-a11\"><div class=\"wl-wrap wl-section\"><h2 id=\"where-problems-can-develop-along-the-esa-path\">Where Problems\nCan Develop Along the ESA Path<\/h2>\n<p>A practical check follows the electrical path through the printing\nunit:<\/p>\n<p><strong>ESA charging system \u2192 roller core or sleeve \u2192 conductive or\nsemi-conductive cover structure \u2192 working surface \u2192 substrate \u2192 gravure\ncylinder<\/strong><\/p>\n<p>The impression roll sits in the middle of this path and carries the\nmechanical impression load at the same time. Poor nip contact can weaken\ntransfer even when the electrical side is working correctly. An\nunsuitable roller construction can also limit ESA performance even when\nthe mechanical impression looks normal.<\/p>\n<p>ESA equipment uses different charging arrangements. Depending on the\npress and system, the electrical route can involve the core, carrier\nsleeve, insulating sections, conductive or semi-conductive layers, and\nthe outer working cover in different ways.<\/p>\n<p>General conductive material directions can be found under <a\nhref=\"https:\/\/wolorin.com\/es\/material\/anti-static-rubber-rollers\/\">Rodillos de caucho antiest\u00e1ticos\/conductores<\/a>. For an ESA impression position, use the\npress or ESA supplier's roller specification and approved measurement\nmethod as the reference.<\/p>\n<p>High-voltage components, electrodes, grounding, electrical\nconnections, and ESA safety circuits should be checked by qualified\npress or ESA personnel.<\/p>\n<h3 id=\"keep-a-baseline-before-changing-several-conditions\">Keep a\nBaseline Before Changing Several Conditions<\/h3>\n<p>ESA troubleshooting becomes much easier when measurements taken weeks\nor months apart can actually be compared.<\/p>\n<div class=\"wl-table\"><table>\n<thead>\n<tr class=\"header\">\n<th>Record<\/th>\n<th>Details Worth Keeping<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"odd\">\n<td>Sistema ESA<\/td>\n<td>Equipment supplier, system type, and specified roller electrical\nrequirements<\/td>\n<\/tr>\n<tr class=\"even\">\n<td>Electrical measurement<\/td>\n<td>Instrument, approved method, measurement position, date, roller\ntemperature, and humidity<\/td>\n<\/tr>\n<tr class=\"odd\">\n<td>Condici\u00f3n del rodillo<\/td>\n<td>Original and current diameter, remaining cover thickness, grinding\nand re-covering history<\/td>\n<\/tr>\n<tr class=\"even\">\n<td>Printing condition<\/td>\n<td>Substrate, line speed, impression setting, and recent process\nchanges<\/td>\n<\/tr>\n<tr class=\"odd\">\n<td>Visible problem<\/td>\n<td>Cross-web position, arcing location, cracks, burn traces,\ncontamination, or unusual wear<\/td>\n<\/tr>\n<tr class=\"even\">\n<td>ESA comparison<\/td>\n<td>Result from the same marked print area with ESA on and off<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n<p>The useful part is the sequence: when the roller worked normally,\nwhat changed, and when the symptom first appeared.<\/p>\n\n<h2 id=\"what-weak-esa-looks-like-on-press\">What Weak ESA Looks Like on\nPress<\/h2>\n<p>Start with the same print area under comparable conditions. Keep the\nsubstrate, ink condition, line speed, and impression setting as stable\nas practical, then compare ESA on and off.<\/p>\n<p>If transfer improves clearly with ESA on and falls back when it is\nswitched off, the electrostatic assist is contributing to the result. If\nthis difference used to be clear and has gradually become much smaller,\nlook at what changed during the same period.<\/p>\n<p>A recent roller replacement, grinding cycle, increasing cover wear,\nsubstrate change, different humidity, or work on the ESA equipment can\nall provide useful timing clues.<\/p>\n<p>Mechanical impression still needs to be separated from the ESA\neffect. When the defect responds strongly to pressure adjustment but\nchanges little with ESA on and off, check roller profile, surface\ncondition, hardness, runout, and pressure distribution. These factors\nare covered further under <a\nhref=\"https:\/\/wolorin.com\/es\/function\/pressure-rollers\/\">Rodillos de presi\u00f3n<\/a>.<\/p>\n<\/div><\/article>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-596a757 elementor-widget elementor-widget-html\" data-id=\"596a757\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\n.wl-a11{font-family:Inter,Arial,sans-serif;color:#2f3f50;font-size:16px;line-height:1.72;background:#fff}.wl-a11 *{box-sizing:border-box}.wl-a11 .wl-wrap{max-width:1180px;margin:0 auto;padding:58px 42px}.wl-a11 h1,.wl-a11 h2,.wl-a11 h3{color:#153a63;margin:0 0 20px;line-height:1.16}.wl-a11 h1{font-size:42px;font-weight:700}.wl-a11 h2{font-size:32px;font-weight:700;padding-top:8px}.wl-a11 h2+*{margin-top:0}.wl-a11 h3{font-size:22px;font-weight:700;margin-top:34px}.wl-a11 p{margin:0 0 18px}.wl-a11 ul,.wl-a11 ol{margin:0 0 22px;padding-left:24px}.wl-a11 li{margin:7px 0}.wl-a11 a{color:#1565c0;text-decoration:none}.wl-a11 a:hover{color:#f4b938}.wl-a11 strong{font-weight:700;color:#243c55}.wl-a11 .wl-table{overflow-x:auto;margin:26px 0 30px;border:1px solid #dde5ec;border-radius:10px}.wl-a11 table{width:100%;border-collapse:collapse;min-width:680px}.wl-a11 th{background:#153a63;color:#fff;font-weight:700;text-align:left}.wl-a11 th,.wl-a11 td{padding:13px 15px;border:1px solid #dde5ec;vertical-align:top}.wl-a11 tbody tr:nth-child(even){background:#f7f9fb}.wl-a11 blockquote{margin:24px 0;padding:18px 22px;border-left:4px solid #f4b938;background:#f6f8fa}.wl-a11 pre{white-space:pre-wrap;background:#153a63;color:#fff;padding:22px;border-radius:10px;overflow:auto}.wl-a11 code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.wl-a11 .wl-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:42px;align-items:center;background:#f5f7f9}.wl-a11 .wl-hero-media{background:#fff;border:1px solid #dde5ec;border-radius:12px;padding:14px}.wl-a11 .wl-hero img{width:100%;aspect-ratio:4\/3;object-fit:cover;border-radius:8px;display:block}.wl-a11 .wl-section{border-top:1px solid #edf1f4}.wl-a11 .wl-section h2:not(:first-child){margin-top:58px;padding-top:42px;border-top:1px solid #edf1f4}.wl-a11 .wl-cta{background:#f4f6f8}.wl-a11 .wl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}.wl-a11 .wl-btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:6px;background:#f4b938;color:#153a63!important;font-weight:700}.wl-a11 .wl-btn:nth-child(even){background:#fff;border:1px solid #cfd9e3}.wl-a11 .wl-btn:hover{background:#153a63;color:#fff!important}\n@media(max-width:767px){.wl-a11 .wl-wrap{padding:38px 22px}.wl-a11 .wl-hero{grid-template-columns:1fr}.wl-a11 h1{font-size:33px}.wl-a11 h2{font-size:27px}.wl-a11 h3{font-size:21px}.wl-a11 .wl-hero-media{order:2}.wl-a11 .wl-section h2:not(:first-child){margin-top:42px;padding-top:32px}}\n<\/style><article class=\"wl-a11\"><div class=\"wl-wrap wl-section\"><h2 id=\"a-fixed-weak-band-can-help-locate-the-problem\">A Fixed Weak Band\nCan Help Locate the Problem<\/h2>\n<p>A general complaint that \u201cESA is weak\u201d gives little location\ninformation. A narrow weak band that keeps returning in the same place\nis far more useful.<\/p>\n<p>Mark the band across the substrate and compare it with the\ncorresponding area on the impression roll face. If the weak zone remains\nin the same position through different images or production jobs,\ninspect that section of the roller for uneven wear, contamination, cuts,\ncracks, or other surface changes.<\/p>\n<p>For example, a wide gravure job may print normally across most of the\nweb while one lane near an edge repeatedly loses ESA benefit. If the\nweak lane stays in that position even after the image layout changes,\nthe location itself becomes an important clue.<\/p>\n<p>When the weak area consistently follows one roller-face zone, the\nimpression roll deserves closer inspection. When it stays tied to a\ncharging zone or another fixed part of the machine, the ESA equipment\nside deserves more attention.<\/p>\n\n<h2\nid=\"arcing-can-reveal-whether-the-fault-moves-with-the-roller\">Arcing\nCan Reveal Whether the Fault Moves With the Roller<\/h2>\n<p>Before cleaning the area or changing parts, record where the\ndischarge appears.<\/p>\n<p>From the roller side, useful visible evidence includes small cuts,\ncracks, pinholes, worn edges, contamination tracks, burn marks, or an\nunderlying layer becoming visible through the cover.<\/p>\n<p>Watch what happens over several roller revolutions.<\/p>\n<p>If the discharge returns whenever the same circumferential point\nreaches the nip or charging area, inspect that physical point on the\nroller closely. A small damaged area can produce a once-per-revolution\nevent and appear intermittent on press.<\/p>\n<p>If the discharge remains at the same machine-side position while\ndifferent parts of the roller pass through it, the evidence points more\nstrongly toward a stationary electrode, nearby electrical component, or\nanother fixed part of the ESA path.<\/p>\n<p>Ink mist, solvent residue, cleaner residue, and contamination around\na damaged surface can make the local condition less stable. If arcing\nkeeps returning, photograph the surface before it is cleaned again.<\/p>\n<\/div><\/article>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1a67ab4 elementor-widget elementor-widget-html\" data-id=\"1a67ab4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\n.wl-a11{font-family:Inter,Arial,sans-serif;color:#2f3f50;font-size:16px;line-height:1.72;background:#fff}.wl-a11 *{box-sizing:border-box}.wl-a11 .wl-wrap{max-width:1180px;margin:0 auto;padding:58px 42px}.wl-a11 h1,.wl-a11 h2,.wl-a11 h3{color:#153a63;margin:0 0 20px;line-height:1.16}.wl-a11 h1{font-size:42px;font-weight:700}.wl-a11 h2{font-size:32px;font-weight:700;padding-top:8px}.wl-a11 h2+*{margin-top:0}.wl-a11 h3{font-size:22px;font-weight:700;margin-top:34px}.wl-a11 p{margin:0 0 18px}.wl-a11 ul,.wl-a11 ol{margin:0 0 22px;padding-left:24px}.wl-a11 li{margin:7px 0}.wl-a11 a{color:#1565c0;text-decoration:none}.wl-a11 a:hover{color:#f4b938}.wl-a11 strong{font-weight:700;color:#243c55}.wl-a11 .wl-table{overflow-x:auto;margin:26px 0 30px;border:1px solid #dde5ec;border-radius:10px}.wl-a11 table{width:100%;border-collapse:collapse;min-width:680px}.wl-a11 th{background:#153a63;color:#fff;font-weight:700;text-align:left}.wl-a11 th,.wl-a11 td{padding:13px 15px;border:1px solid #dde5ec;vertical-align:top}.wl-a11 tbody tr:nth-child(even){background:#f7f9fb}.wl-a11 blockquote{margin:24px 0;padding:18px 22px;border-left:4px solid #f4b938;background:#f6f8fa}.wl-a11 pre{white-space:pre-wrap;background:#153a63;color:#fff;padding:22px;border-radius:10px;overflow:auto}.wl-a11 code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.wl-a11 .wl-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:42px;align-items:center;background:#f5f7f9}.wl-a11 .wl-hero-media{background:#fff;border:1px solid #dde5ec;border-radius:12px;padding:14px}.wl-a11 .wl-hero img{width:100%;aspect-ratio:4\/3;object-fit:cover;border-radius:8px;display:block}.wl-a11 .wl-section{border-top:1px solid #edf1f4}.wl-a11 .wl-section h2:not(:first-child){margin-top:58px;padding-top:42px;border-top:1px solid #edf1f4}.wl-a11 .wl-cta{background:#f4f6f8}.wl-a11 .wl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}.wl-a11 .wl-btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:6px;background:#f4b938;color:#153a63!important;font-weight:700}.wl-a11 .wl-btn:nth-child(even){background:#fff;border:1px solid #cfd9e3}.wl-a11 .wl-btn:hover{background:#153a63;color:#fff!important}\n@media(max-width:767px){.wl-a11 .wl-wrap{padding:38px 22px}.wl-a11 .wl-hero{grid-template-columns:1fr}.wl-a11 h1{font-size:33px}.wl-a11 h2{font-size:27px}.wl-a11 h3{font-size:21px}.wl-a11 .wl-hero-media{order:2}.wl-a11 .wl-section h2:not(:first-child){margin-top:42px;padding-top:32px}}\n<\/style><article class=\"wl-a11\"><div class=\"wl-wrap wl-section\"><h2 id=\"resistance-drift-only-makes-sense-as-a-trend\">Resistance Drift\nOnly Makes Sense as a Trend<\/h2>\n<p>A single resistance reading has limited value without the measurement\nconditions around it.<\/p>\n<p>Use the same approved method and measurement position when comparing\nthe roller over time. Keep the instrument type, roller temperature,\nhumidity, current diameter, and surface condition with the reading.<\/p>\n<p>ESA impression rolls may contain several electrically functional\nsections. Depending on the design, the supplier can define different\nelectrical properties for different parts of the roller construction. A\nconvenient value measured at the working surface may therefore represent\nonly one part of the electrical path.<\/p>\n<p>If the specified test requires a particular measurement arrangement,\nkeep using that arrangement for comparison. Changing the method halfway\nthrough the roller's service life can create an apparent \u201cdrift\u201d that\ncomes from the test rather than the roller.<\/p>\n<p>The most useful history often looks simple: the roller was stable at\nits earlier diameter, went through several grinding cycles, and then the\nelectrical readings or print behavior began to move.<\/p>\n\n<h2 id=\"why-grinding-history-matters-on-an-esa-roll\">Why Grinding\nHistory Matters on an ESA Roll<\/h2>\n<p>Every grinding cycle removes part of the rubber cover and moves the\nworking surface closer to the structure underneath.<\/p>\n<p>On a multi-layer ESA roll, this can reduce the remaining thickness of\na functional layer, move the surface closer to a transition between\nlayers, or bring previously buried damage closer to the working\nsurface.<\/p>\n<p>The electrical result depends on the actual construction. There is no\nuseful universal rule saying that resistance must rise or fall as the\nroll becomes smaller.<\/p>\n<p>For a roller that has been ground several times, keep the original\ndiameter if known, current diameter, remaining cover thickness, grinding\ndates or history, and comparable electrical readings. This makes it\npossible to see whether the change developed gradually with cover\nremoval or appeared suddenly after one grinding operation.<\/p>\n<p>Grinding also changes the working surface. If weak transfer or\nunstable behavior starts immediately afterward, check surface condition,\nroller geometry, and the electrical history together.<\/p>\n<\/div><\/article>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fe43129 elementor-widget elementor-widget-html\" data-id=\"fe43129\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\n.wl-a11{font-family:Inter,Arial,sans-serif;color:#2f3f50;font-size:16px;line-height:1.72;background:#fff}.wl-a11 *{box-sizing:border-box}.wl-a11 .wl-wrap{max-width:1180px;margin:0 auto;padding:58px 42px}.wl-a11 h1,.wl-a11 h2,.wl-a11 h3{color:#153a63;margin:0 0 20px;line-height:1.16}.wl-a11 h1{font-size:42px;font-weight:700}.wl-a11 h2{font-size:32px;font-weight:700;padding-top:8px}.wl-a11 h2+*{margin-top:0}.wl-a11 h3{font-size:22px;font-weight:700;margin-top:34px}.wl-a11 p{margin:0 0 18px}.wl-a11 ul,.wl-a11 ol{margin:0 0 22px;padding-left:24px}.wl-a11 li{margin:7px 0}.wl-a11 a{color:#1565c0;text-decoration:none}.wl-a11 a:hover{color:#f4b938}.wl-a11 strong{font-weight:700;color:#243c55}.wl-a11 .wl-table{overflow-x:auto;margin:26px 0 30px;border:1px solid #dde5ec;border-radius:10px}.wl-a11 table{width:100%;border-collapse:collapse;min-width:680px}.wl-a11 th{background:#153a63;color:#fff;font-weight:700;text-align:left}.wl-a11 th,.wl-a11 td{padding:13px 15px;border:1px solid #dde5ec;vertical-align:top}.wl-a11 tbody tr:nth-child(even){background:#f7f9fb}.wl-a11 blockquote{margin:24px 0;padding:18px 22px;border-left:4px solid #f4b938;background:#f6f8fa}.wl-a11 pre{white-space:pre-wrap;background:#153a63;color:#fff;padding:22px;border-radius:10px;overflow:auto}.wl-a11 code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.wl-a11 .wl-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:42px;align-items:center;background:#f5f7f9}.wl-a11 .wl-hero-media{background:#fff;border:1px solid #dde5ec;border-radius:12px;padding:14px}.wl-a11 .wl-hero img{width:100%;aspect-ratio:4\/3;object-fit:cover;border-radius:8px;display:block}.wl-a11 .wl-section{border-top:1px solid #edf1f4}.wl-a11 .wl-section h2:not(:first-child){margin-top:58px;padding-top:42px;border-top:1px solid #edf1f4}.wl-a11 .wl-cta{background:#f4f6f8}.wl-a11 .wl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}.wl-a11 .wl-btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:6px;background:#f4b938;color:#153a63!important;font-weight:700}.wl-a11 .wl-btn:nth-child(even){background:#fff;border:1px solid #cfd9e3}.wl-a11 .wl-btn:hover{background:#153a63;color:#fff!important}\n@media(max-width:767px){.wl-a11 .wl-wrap{padding:38px 22px}.wl-a11 .wl-hero{grid-template-columns:1fr}.wl-a11 h1{font-size:33px}.wl-a11 h2{font-size:27px}.wl-a11 h3{font-size:21px}.wl-a11 .wl-hero-media{order:2}.wl-a11 .wl-section h2:not(:first-child){margin-top:42px;padding-top:32px}}\n<\/style><article class=\"wl-a11\"><div class=\"wl-wrap wl-section\"><h2 id=\"what-can-change-after-re-covering-or-roller-replacement\">What\nCan Change After Re-Covering or Roller Replacement<\/h2>\n<p>A re-covered ESA impression roll can match the drawing in outside\ndiameter, face length, and hardness and still behave differently on\npress.<\/p>\n<p>The finished roller may depend on the relationship between the core\nor carrier sleeve, insulating section, conductive or semi-conductive\nlayers, working cover, and the connections between those sections.<\/p>\n<p>Cover thickness, bonding, curing, grinding, and final surface\ncondition all become part of the finished build. A replacement that\ncopies only diameter, hardness, and a general rubber name can miss part\nof the original ESA construction.<\/p>\n<p>This becomes especially relevant when the old roll worked normally\nfor a long time and weak ESA, resistance drift, or arcing begins\nimmediately after re-covering or replacement.<\/p>\n<p>Keep the previous drawing, original roller specification, old\nelectrical records, grinding history, and photos of the old cover when\navailable. They give a much clearer manufacturing reference than the\nmaterial name alone.<\/p>\n<p>Two covers described under the same general rubber family can still\nbehave differently because of compound direction, conductive structure,\nbonding, curing, layer build, grinding, and finished surface\ncondition.<\/p>\n\n<h2 id=\"what-to-prepare-for-an-esa-impression-roll-replacement\">What to\nPrepare for an ESA Impression Roll Replacement<\/h2>\n<p>When an existing ESA impression roll has worked well for a long time,\na confirmed drawing and proven specification can make replacement\nstraightforward.<\/p>\n<p>If the old roller has developed weak assist, resistance changes,\narcing, cracking, or unusual wear, include the history that shows what\nhappened to the roller over time.<\/p>\n<p>La informaci\u00f3n \u00fatil incluye:<\/p>\n<ul>\n<li>Roller drawing or the main dimensions.<\/li>\n<li>Outside diameter, face length, shaft or sleeve details.<\/li>\n<li>Old roller photos, especially cracks, burn traces, wear,\ncontamination, or edge damage.<\/li>\n<li>Roller position and printing unit.<\/li>\n<li>ESA system and supplier information, together with the specified\nroller requirements when available.<\/li>\n<li>Cover material, hardness, original thickness, current remaining\nthickness, and grinding history when known.<\/li>\n<li>Ink, solvent, cleaner, or other media that contact the roller\ncover.<\/li>\n<li>The current roller-related problem and when it started.<\/li>\n<li>Whether the symptom changes with ESA on\/off, roller position,\ngrinding, speed, humidity, or roller temperature.<\/li>\n<\/ul>\n<p>These details help separate a straightforward reproduction of a\nproven roller from a replacement that needs closer confirmation of the\ncover and electrical construction before manufacturing.<\/p>\n<p>Problems traced to the generator, electrodes, grounding, high-voltage\ncircuit, or other ESA hardware should remain with the press or ESA\nequipment specialist. Roller manufacturing becomes relevant when the\nevidence points to the impression roll construction, cover condition,\nwear history, or replacement itself.<\/p>\n<p>For other rubber-covered positions around the press, <a\nhref=\"https:\/\/wolorin.com\/es\/applications\/printing-industry-rollers\/\">Rodillos para la industria de la impresi\u00f3n<\/a> provides the wider application context.<\/p>\n<\/div><\/article>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3f1d499 elementor-widget elementor-widget-html\" data-id=\"3f1d499\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\n.wl-a11{font-family:Inter,Arial,sans-serif;color:#2f3f50;font-size:16px;line-height:1.72;background:#fff}.wl-a11 *{box-sizing:border-box}.wl-a11 .wl-wrap{max-width:1180px;margin:0 auto;padding:58px 42px}.wl-a11 h1,.wl-a11 h2,.wl-a11 h3{color:#153a63;margin:0 0 20px;line-height:1.16}.wl-a11 h1{font-size:42px;font-weight:700}.wl-a11 h2{font-size:32px;font-weight:700;padding-top:8px}.wl-a11 h2+*{margin-top:0}.wl-a11 h3{font-size:22px;font-weight:700;margin-top:34px}.wl-a11 p{margin:0 0 18px}.wl-a11 ul,.wl-a11 ol{margin:0 0 22px;padding-left:24px}.wl-a11 li{margin:7px 0}.wl-a11 a{color:#1565c0;text-decoration:none}.wl-a11 a:hover{color:#f4b938}.wl-a11 strong{font-weight:700;color:#243c55}.wl-a11 .wl-table{overflow-x:auto;margin:26px 0 30px;border:1px solid #dde5ec;border-radius:10px}.wl-a11 table{width:100%;border-collapse:collapse;min-width:680px}.wl-a11 th{background:#153a63;color:#fff;font-weight:700;text-align:left}.wl-a11 th,.wl-a11 td{padding:13px 15px;border:1px solid #dde5ec;vertical-align:top}.wl-a11 tbody tr:nth-child(even){background:#f7f9fb}.wl-a11 blockquote{margin:24px 0;padding:18px 22px;border-left:4px solid #f4b938;background:#f6f8fa}.wl-a11 pre{white-space:pre-wrap;background:#153a63;color:#fff;padding:22px;border-radius:10px;overflow:auto}.wl-a11 code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.wl-a11 .wl-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:42px;align-items:center;background:#f5f7f9}.wl-a11 .wl-hero-media{background:#fff;border:1px solid #dde5ec;border-radius:12px;padding:14px}.wl-a11 .wl-hero img{width:100%;aspect-ratio:4\/3;object-fit:cover;border-radius:8px;display:block}.wl-a11 .wl-section{border-top:1px solid #edf1f4}.wl-a11 .wl-section h2:not(:first-child){margin-top:58px;padding-top:42px;border-top:1px solid #edf1f4}.wl-a11 .wl-cta{background:#f4f6f8}.wl-a11 .wl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}.wl-a11 .wl-btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:6px;background:#f4b938;color:#153a63!important;font-weight:700}.wl-a11 .wl-btn:nth-child(even){background:#fff;border:1px solid #cfd9e3}.wl-a11 .wl-btn:hover{background:#153a63;color:#fff!important}\n@media(max-width:767px){.wl-a11 .wl-wrap{padding:38px 22px}.wl-a11 .wl-hero{grid-template-columns:1fr}.wl-a11 h1{font-size:33px}.wl-a11 h2{font-size:27px}.wl-a11 h3{font-size:21px}.wl-a11 .wl-hero-media{order:2}.wl-a11 .wl-section h2:not(:first-child){margin-top:42px;padding-top:32px}}\n<\/style><article class=\"wl-a11\"><div class=\"wl-wrap wl-section\"><h2 id=\"related-pages\">P\u00e1ginas relacionadas<\/h2>\n<p><a\nhref=\"https:\/\/wolorin.com\/es\/material\/anti-static-rubber-rollers\/\">Rodillos de caucho antiest\u00e1ticos\/conductores<\/a> \u2014 Conductive and charge-control material\ndirections for industrial rubber rollers.<\/p>\n<p><a\nhref=\"https:\/\/wolorin.com\/es\/applications\/printing-industry-rollers\/\">Rodillos para la industria de la impresi\u00f3n<\/a> \u2014 Rubber-covered roller positions used around\nprinting and material handling.<\/p>\n<p><a href=\"https:\/\/wolorin.com\/es\/function\/pressure-rollers\/\">Rodillos de presi\u00f3n<\/a> \u2014 Mechanical nip contact, pressure distribution, roller\ngeometry, and surface condition.<\/p>\n<p><a href=\"https:\/\/wolorin.com\/es\/material\/nbr-rubber-rollers\/\">Rodillos de caucho NBR\/nitrilo<\/a> \u2014 General NBR material information for\nselected ink and industrial media-contact roller positions.<\/p><\/div><\/article>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-74d0d42 elementor-widget elementor-widget-html\" data-id=\"74d0d42\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\n.wl-a11{font-family:Inter,Arial,sans-serif;color:#2f3f50;font-size:16px;line-height:1.72;background:#fff}.wl-a11 *{box-sizing:border-box}.wl-a11 .wl-wrap{max-width:1180px;margin:0 auto;padding:58px 42px}.wl-a11 h1,.wl-a11 h2,.wl-a11 h3{color:#153a63;margin:0 0 20px;line-height:1.16}.wl-a11 h1{font-size:42px;font-weight:700}.wl-a11 h2{font-size:32px;font-weight:700;padding-top:8px}.wl-a11 h2+*{margin-top:0}.wl-a11 h3{font-size:22px;font-weight:700;margin-top:34px}.wl-a11 p{margin:0 0 18px}.wl-a11 ul,.wl-a11 ol{margin:0 0 22px;padding-left:24px}.wl-a11 li{margin:7px 0}.wl-a11 a{color:#1565c0;text-decoration:none}.wl-a11 a:hover{color:#f4b938}.wl-a11 strong{font-weight:700;color:#243c55}.wl-a11 .wl-table{overflow-x:auto;margin:26px 0 30px;border:1px solid #dde5ec;border-radius:10px}.wl-a11 table{width:100%;border-collapse:collapse;min-width:680px}.wl-a11 th{background:#153a63;color:#fff;font-weight:700;text-align:left}.wl-a11 th,.wl-a11 td{padding:13px 15px;border:1px solid #dde5ec;vertical-align:top}.wl-a11 tbody tr:nth-child(even){background:#f7f9fb}.wl-a11 blockquote{margin:24px 0;padding:18px 22px;border-left:4px solid #f4b938;background:#f6f8fa}.wl-a11 pre{white-space:pre-wrap;background:#153a63;color:#fff;padding:22px;border-radius:10px;overflow:auto}.wl-a11 code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.wl-a11 .wl-hero{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(320px,.75fr);gap:42px;align-items:center;background:#f5f7f9}.wl-a11 .wl-hero-media{background:#fff;border:1px solid #dde5ec;border-radius:12px;padding:14px}.wl-a11 .wl-hero img{width:100%;aspect-ratio:4\/3;object-fit:cover;border-radius:8px;display:block}.wl-a11 .wl-section{border-top:1px solid #edf1f4}.wl-a11 .wl-section h2:not(:first-child){margin-top:58px;padding-top:42px;border-top:1px solid #edf1f4}.wl-a11 .wl-cta{background:#f4f6f8}.wl-a11 .wl-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}.wl-a11 .wl-btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;border-radius:6px;background:#f4b938;color:#153a63!important;font-weight:700}.wl-a11 .wl-btn:nth-child(even){background:#fff;border:1px solid #cfd9e3}.wl-a11 .wl-btn:hover{background:#153a63;color:#fff!important}\n@media(max-width:767px){.wl-a11 .wl-wrap{padding:38px 22px}.wl-a11 .wl-hero{grid-template-columns:1fr}.wl-a11 h1{font-size:33px}.wl-a11 h2{font-size:27px}.wl-a11 h3{font-size:21px}.wl-a11 .wl-hero-media{order:2}.wl-a11 .wl-section h2:not(:first-child){margin-top:42px;padding-top:32px}}\n<\/style><article class=\"wl-a11\"><div class=\"wl-wrap wl-cta\"><p>If you already have drawings, dimensions, samples, or a clear ESA\nimpression-roll specification, send them directly for custom\nmanufacturing, quotation, or production confirmation.<\/p>\n<p>If details are incomplete, start with old roller photos, basic\ndimensions, roller position, contact medium, and the current\nroller-related problem.<\/p><div class=\"wl-actions\"><a class=\"wl-btn\" href=\"https:\/\/wolorin.com\/es\/contact-us\/\">Contacto<\/a><a class=\"wl-btn\" href=\"https:\/\/wolorin.com\/es\/send-drawings\/\">Enviar planos o datos del rodillo<\/a><\/div><\/div><\/article>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Gravure ESA Impression Roll Problems Weak electrostatic assist often appears first as a printing change. Fine image areas develop more missing dots, one band across the web transfers less cleanly, or the improvement normally seen with ESA on becomes noticeably smaller. Arcing and changing resistance give stronger location clues. Pay particular attention when either starts [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5427","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/posts\/5427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/comments?post=5427"}],"version-history":[{"count":13,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/posts\/5427\/revisions"}],"predecessor-version":[{"id":5550,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/posts\/5427\/revisions\/5550"}],"wp:attachment":[{"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/media?parent=5427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/categories?post=5427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/tags?post=5427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}