{"id":4234,"date":"2026-06-03T01:00:15","date_gmt":"2026-06-03T01:00:15","guid":{"rendered":"https:\/\/wolorin.com\/?page_id=4234"},"modified":"2026-06-10T03:26:33","modified_gmt":"2026-06-10T03:26:33","slug":"repeat-marks-web-materials","status":"publish","type":"post","link":"https:\/\/wolorin.com\/es\/blog\/repeat-marks-web-materials\/","title":{"rendered":"Why Do Repeat Marks Appear on Web Materials?"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"4234\" class=\"elementor elementor-4234\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5c93f424 e-flex e-con-boxed e-con e-parent\" data-id=\"5c93f424\" 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-62acccee elementor-widget elementor-widget-heading\" data-id=\"62acccee\" 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<h2 class=\"elementor-heading-title elementor-size-default\">Why Do Repeat Marks Appear on Web Materials?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-690a76d9 e-con-full e-flex e-con e-child\" data-id=\"690a76d9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-50fb3e6c e-con-full e-flex e-con e-child\" data-id=\"50fb3e6c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-610ed12b elementor-widget elementor-widget-text-editor\" data-id=\"610ed12b\" 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 class=\"isSelectedEnd\">A repeat mark often shows up after winding, rewinding, slitting, coating, laminating, or final inspection. The web may look normal in some areas, then the same short mark, shadow, dull spot, pressure band, or small surface defect appears again along the roll.<\/p><p class=\"isSelectedEnd\">For film, paper, foil, nonwoven, label stock, and flexible packaging materials, this kind of mark should be checked differently from random scratches or general surface dirt. A random scratch can come from handling, dust, cutting, or one-time contact. A repeat mark usually has a rhythm behind it.<\/p><p>Comience por el punto donde la marca se hace visible por primera vez. Luego, revise el recorrido de la banda: contacto de bobinado, presi\u00f3n de mordida, rodillos gu\u00eda o de tracci\u00f3n, rodillos de presi\u00f3n, rodillos de apoyo y cualquier superficie de rodillo que toque el material repetidamente. Si la marca sigue una pieza giratoria o se intensifica despu\u00e9s del rebobinado, se debe verificar la posici\u00f3n del rodillo y el estado de contacto antes de considerarla una simple mancha superficial.<\/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-1aea9eb6 e-con-full e-flex e-con e-child\" data-id=\"1aea9eb6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-15da79de elementor-widget elementor-widget-image\" data-id=\"15da79de\" 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=\"597\" src=\"https:\/\/wolorin.com\/wp-content\/uploads\/2026\/04\/industrial-printing-machine-with-web-material.webp\" class=\"attachment-large size-large wp-image-1924\" alt=\"Industrial printing machine with web material\" srcset=\"https:\/\/wolorin.com\/wp-content\/uploads\/2026\/04\/industrial-printing-machine-with-web-material.webp 800w, https:\/\/wolorin.com\/wp-content\/uploads\/2026\/04\/industrial-printing-machine-with-web-material-300x224.webp 300w, https:\/\/wolorin.com\/wp-content\/uploads\/2026\/04\/industrial-printing-machine-with-web-material-768x573.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"  title=\"Why Do Repeat Marks Appear on Web Materials?\" \/>\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-150988b e-flex e-con-boxed e-con e-parent\" data-id=\"150988b\" 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-49b47230 elementor-widget elementor-widget-heading\" data-id=\"49b47230\" 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<h2 class=\"elementor-heading-title elementor-size-default\">What repeat marks look like<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2bda8a7 elementor-widget elementor-widget-text-editor\" data-id=\"2bda8a7\" 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 class=\"isSelectedEnd\">Repeat marks are not always deep or obvious. Some are only visible under side light. Some look like short pressure marks. Some look like a light gloss change, a dull patch, a small dent, a repeated dirt spot, or a faint band across the web.<\/p><p class=\"isSelectedEnd\">On bright film or coated surfaces, a repeat mark may look like a small optical defect. On paper or nonwoven, it may look more like local compression or surface texture change. On foil or metallized material, even a weak pressure difference can become visible because the surface reflects light clearly.<\/p><p class=\"isSelectedEnd\">Los s\u00edntomas t\u00edpicos incluyen:<\/p><ul data-spread=\"false\"><li>the same mark appears again along the roll;<\/li><li>the mark becomes clearer after rewinding;<\/li><li>the mark is stronger in one slit lane or near one edge;<\/li><li>the mark changes after pressure, speed, or tension adjustment;<\/li><li>the mark appears together with slight vibration, tracking movement, or winding instability;<\/li><li>the old roller surface has one local damaged, shiny, swollen, or contaminated area.<\/li><\/ul><p>This is the main difference from ordinary surface marks. With repeat marks, the shape is useful, but the rhythm and position are more important.<\/p>\t\t\t\t\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-a5a403d e-flex e-con-boxed e-con e-parent\" data-id=\"a5a403d\" 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-551f724 elementor-widget elementor-widget-heading\" data-id=\"551f724\" 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<h2 class=\"elementor-heading-title elementor-size-default\">Repeat interval and roller circumference<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4c9adbb elementor-widget elementor-widget-text-editor\" data-id=\"4c9adbb\" 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 class=\"isSelectedEnd\">Once the mark is confirmed as repeated, measure the distance from one mark to the next similar mark. Measure several intervals if possible. Then compare that spacing with the diameter of rollers near the problem area.<\/p><p class=\"isSelectedEnd\">A simple first check is:<\/p><p class=\"isSelectedEnd\">repeat distance \u2248 3.14 \u00d7 roller diameter<\/p><p class=\"isSelectedEnd\">For quick reference:<\/p><table><tbody><tr><th>Di\u00e1metro del rodillo<\/th><th>Approximate circumference<\/th><\/tr><tr><td>100 mm<\/td><td>314 mm<\/td><\/tr><tr><td>150 mm<\/td><td>471 mm<\/td><\/tr><tr><td>200 mm<\/td><td>628 mm<\/td><\/tr><tr><td>250 mm<\/td><td>785 mm<\/td><\/tr><tr><td>300 mm<\/td><td>942 mm<\/td><\/tr><\/tbody><\/table><p class=\"isSelectedEnd\">If the mark spacing is close to one of the roller circumferences, that roller should be checked first. The number does not need to match perfectly. Web thickness, tension, nip compression, slip, rubber cover deformation, and winding build-up can all shift the actual spacing.<\/p><p class=\"isSelectedEnd\">If the mark appears by time instead of distance, record the line speed and how often the mark appears. The spacing can be estimated by:<\/p><p class=\"isSelectedEnd\">mark spacing \u2248 line speed \u00f7 mark frequency<\/p><p class=\"isSelectedEnd\">In <a href=\"https:\/\/wolorin.com\/es\/applications\/slitting-and-rewinding-line-rollers\/\">Rodillos para l\u00edneas de corte longitudinal y rebobinado<\/a>, Esta comprobaci\u00f3n resulta \u00fatil en las proximidades de los rodillos de tracci\u00f3n, rodillos gu\u00eda, rodillos de presi\u00f3n, rodillos de apoyo y puntos de contacto de rebobinado. Se puede crear una marca antes del rebobinado, que se har\u00e1 m\u00e1s visible tras aplicar presi\u00f3n. Tambi\u00e9n se puede crear directamente en el punto de contacto de rebobinado.<\/p><p>If the spacing does not match any roller circumference, continue checking driven shafts, belts, gears, winding roll diameter, coating repeat, print repeat, label repeat, or a speed-related vibration. The roller is still a key check point, but the whole rotating path should be considered.<\/p>\t\t\t\t\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-29be207 e-flex e-con-boxed e-con e-parent\" data-id=\"29be207\" 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-1f53b2e elementor-widget elementor-widget-heading\" data-id=\"1f53b2e\" 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<h2 class=\"elementor-heading-title elementor-size-default\">Winding contact and nip pressure<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c9cae3d elementor-widget elementor-widget-text-editor\" data-id=\"c9cae3d\" 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 class=\"isSelectedEnd\">Many repeat marks become clearer after rewinding. The reason is usually contact pressure. A small surface difference may be light before winding, but after layer-to-layer pressure, lay-on contact, or nip pressure, it can show more clearly on the roll.<\/p><p class=\"isSelectedEnd\">Check where the mark becomes visible:<\/p><ul data-spread=\"false\"><li>before the winding section;<\/li><li>right after a nip;<\/li><li>only after rewinding;<\/li><li>only after storage;<\/li><li>mainly near the outer layers;<\/li><li>mainly near the core;<\/li><li>only in one slit lane.<\/li><\/ul><p class=\"isSelectedEnd\">If the mark appears mainly after rewinding, check the lay-on roller, pressure roller, winding pressure, roll hardness, entrapped air, and contact width. A small raised point, hard contamination, local flat spot, damaged rubber cover, or uneven pressure area can repeat on the material as the roll builds.<\/p><p class=\"isSelectedEnd\">For sensitive film, release film, coated paper, foil, label stock, and laminated materials, the contact surface of <a href=\"https:\/\/wolorin.com\/es\/function\/pressure-rollers\/\">Rodillos de presi\u00f3n<\/a> is especially important. Hardness, surface finish, cover resilience, roundness, and pressure distribution all affect whether a small contact difference becomes visible.<\/p><p>A clean-looking roller can still create repeat marks. The surface may be clean, but the contact may be unstable because of runout, eccentricity, local hardness change, poor grinding, bearing movement, or uneven nip loading.<\/p>\t\t\t\t\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-f02d2c6 e-flex e-con-boxed e-con e-parent\" data-id=\"f02d2c6\" 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-24c21d4 elementor-widget elementor-widget-heading\" data-id=\"24c21d4\" 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<h2 class=\"elementor-heading-title elementor-size-default\">Runout, eccentricity, or surface defect spot<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e8481b6 elementor-widget elementor-widget-text-editor\" data-id=\"e8481b6\" 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 class=\"isSelectedEnd\">If one part of the roller runs differently from the rest, the web can receive a repeated pressure change. This can happen even when the roller surface looks acceptable at first glance.<\/p><p class=\"isSelectedEnd\">Las causas comunes incluyen:<\/p><ul data-spread=\"false\"><li>roller runout;<\/li><li>eccentric roller body;<\/li><li>bent shaft or worn shaft end;<\/li><li>bearing movement;<\/li><li>uneven grinding;<\/li><li>local flat spot;<\/li><li>local swelling or hardening of the rubber cover;<\/li><li>one damaged, cut, or raised area on the cover.<\/li><\/ul><p class=\"isSelectedEnd\">Runout and eccentricity often show as pressure rhythm. The web may see slightly more contact once per revolution. On a rough or low-value surface, this may not matter much. On bright film, foil, coated paper, label stock, or clean contact materials, the same pressure rhythm can become a visible mark.<\/p><p class=\"isSelectedEnd\">The old roller should be checked carefully. Look for one area that is more polished, more worn, harder, softer, swollen, glazed, or locally damaged. Also check shaft ends, bearing fit, roller roundness, and whether the contact width changes when the roller turns.<\/p><p>For high-speed or surface-sensitive lines, small roller accuracy problems can show on the product. If the mark comes back after replacing or cleaning the roller, runout, shaft condition, grinding accuracy, and contact stability should be checked before making the next roller.<\/p>\t\t\t\t\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-1613bfd e-flex e-con-boxed e-con e-parent\" data-id=\"1613bfd\" 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-2312b7f elementor-widget elementor-widget-heading\" data-id=\"2312b7f\" 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<h2 class=\"elementor-heading-title elementor-size-default\">Contamination or damage at fixed point<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-19b3925 elementor-widget elementor-widget-text-editor\" data-id=\"19b3925\" 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 class=\"isSelectedEnd\">Some repeat marks come from a fixed point on the roller surface. The point may be very small, but it rotates with the roller and touches the web again and again.<\/p><p class=\"isSelectedEnd\">Common fixed-point sources include:<\/p><ul data-spread=\"false\"><li>adhesive build-up;<\/li><li>coating residue;<\/li><li>dust or hard particles pressed into the cover;<\/li><li>tape residue;<\/li><li>cleaning chemical residue;<\/li><li>a small cut, nick, or dent;<\/li><li>a raised rubber edge;<\/li><li>local glazing;<\/li><li>a metal burr or damaged part near the web edge path.<\/li><\/ul><p class=\"isSelectedEnd\">This type of mark can look like contamination, but normal cleaning may only improve it for a short time. If adhesive, coating liquid, dust, static, or release behavior keeps bringing material back to the same area, the mark can return soon after cleaning.<\/p><p class=\"isSelectedEnd\">In <a href=\"https:\/\/wolorin.com\/es\/applications\/film-converting-rollers\/\">Rodillos para conversi\u00f3n de pel\u00edcula<\/a>, small fixed points can show clearly on BOPP, PET, PE, protective film, release film, and similar thin web materials. The same issue can appear on coated paper, foil, and laminated materials when the surface is sensitive to pressure, gloss change, or small particles.<\/p><p>The inspection should cover the full circumference. Clean the roller, rotate it slowly, and check under side light. Do not only inspect the visible top area. Many fixed-point defects are missed because the damaged area is on the lower side or near the web edge path.<\/p>\t\t\t\t\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-a128d93 e-flex e-con-boxed e-con e-parent\" data-id=\"a128d93\" 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-c780fe9 elementor-widget elementor-widget-heading\" data-id=\"c780fe9\" 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<h2 class=\"elementor-heading-title elementor-size-default\">When to check roller accuracy \/ QC direction<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-839e392 elementor-widget elementor-widget-text-editor\" data-id=\"839e392\" 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 class=\"isSelectedEnd\">Las marcas repetidas deben revisarse con mayor detenimiento cuando el producto es sensible a la superficie, la velocidad de la l\u00ednea es alta o el defecto afecta al corte, rebobinado, recubrimiento, impresi\u00f3n, laminado o la aceptaci\u00f3n del cliente. Una marca leve que puede pasar desapercibida en una posici\u00f3n de baja exigencia puede resultar inaceptable en pel\u00edculas brillantes, l\u00e1minas, materiales de liberaci\u00f3n, etiquetas, papel estucado o productos en bobina de alto valor.<\/p><p class=\"isSelectedEnd\">Start with the information that is easiest to collect:<\/p><ul data-spread=\"false\"><li>repeat mark photos;<\/li><li>one photo showing several marks with a ruler;<\/li><li>mark spacing;<\/li><li>product type;<\/li><li>line speed;<\/li><li>roller position;<\/li><li>roller diameter;<\/li><li>web path photo;<\/li><li>old roller surface photos;<\/li><li>pressure or nip position;<\/li><li>whether the mark appears before or after rewinding;<\/li><li>whether cleaning, pressure adjustment, speed change, or roller replacement changes the mark.<\/li><\/ul><p class=\"isSelectedEnd\">For positions near <a href=\"https:\/\/wolorin.com\/es\/function\/guide-rollers\/\">Rodillos gu\u00eda<\/a>, check whether the mark appears together with edge movement, tracking instability, or repeated side contact. For pressure and winding positions, check contact width, pressure balance, old cover condition, runout, surface finish, and bearing condition.<\/p><p class=\"isSelectedEnd\">Many standard replacement rollers can start from existing drawings, size, hardness, roller position, and old roller photos. For higher-requirement positions, the check should go deeper into cover material direction, bonding, grinding accuracy, surface finish, roundness, runout, shaft ends, bearing fit, balance, and pressure contact.<\/p><p>De Wolorin <a href=\"https:\/\/wolorin.com\/es\/company\/quality-control\/\">Control de calidad<\/a> direction is relevant here because repeat marks are often small at the beginning. If roller accuracy, surface condition, and contact behavior are not checked before replacement, the same mark may return after the new roller is installed.<\/p>\t\t\t\t\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-65d7e97 e-flex e-con-boxed e-con e-parent\" data-id=\"65d7e97\" 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-72be231 elementor-widget elementor-widget-heading\" data-id=\"72be231\" 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<h2 class=\"elementor-heading-title elementor-size-default\">Practical Check Table<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a81d524 elementor-widget elementor-widget-text-editor\" data-id=\"a81d524\" 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<table><tbody><tr><td>What you see on the web<\/td><td>What it usually suggests<\/td><td>First check<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Same mark appears again along the roll<\/td><td>Repeating contact or rotating source<\/td><td>Measure spacing and compare with nearby roller circumference<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Mark becomes clearer after rewinding<\/td><td>Winding contact or layer pressure<\/td><td>Check lay-on roller, pressure roller, roll hardness, air entrapment, and winding pressure<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Mark becomes heavier when nip pressure increases<\/td><td>Pressure contact issue<\/td><td>Check nip width, pressure balance, cover hardness, and surface finish<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Mark appears once per roller revolution<\/td><td>Surface spot, runout, eccentricity, or shaft issue<\/td><td>Inspect the full roller circumference, runout, shaft ends, bearing fit, and old cover condition<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Cleaning improves the mark for a short time<\/td><td>Build-up or contamination cycle<\/td><td>Check adhesive, coating residue, dust, static, release behavior, and cleaning method<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Mark appears with vibration or periodic sound<\/td><td>Mechanical rhythm or imbalance<\/td><td>Check roller balance, eccentric shaft, bearing condition, drive rhythm, and speed-related changes<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Mark appears with tracking movement<\/td><td>Guide or path stability issue<\/td><td>Check guide roller position, edge contact, web path, and side rubbing<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Mark appears only in one slit lane<\/td><td>Local lane pressure or local roller surface issue<\/td><td>Check that lane\u2019s roller contact, edge dust, blade area, and roller surface<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Mark spacing changes with line speed<\/td><td>Speed-related vibration, drive, or process rhythm<\/td><td>Record line speed, mark frequency, and rotating component speed<\/td><\/tr><\/tbody><\/table><table><tbody><tr><td>Mark spacing stays close to one roller circumference<\/td><td>Suspect roller source<\/td><td>Check that roller before changing material direction<\/td><\/tr><\/tbody><\/table>\t\t\t\t\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-dcf8bc9 e-flex e-con-boxed e-con e-parent\" data-id=\"dcf8bc9\" 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-fc1b3f8 elementor-widget elementor-widget-heading\" data-id=\"fc1b3f8\" 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<h2 class=\"elementor-heading-title elementor-size-default\">P\u00e1ginas relacionadas<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-638e656 elementor-widget elementor-widget-text-editor\" data-id=\"638e656\" 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<ul><li><a href=\"https:\/\/wolorin.com\/es\/applications\/slitting-and-rewinding-line-rollers\/\">Rodillos para l\u00edneas de corte longitudinal y rebobinado<\/a> \u2014 For repeat marks, winding contact, tension changes, and rewinding-related roller positions.<\/li><li><a href=\"https:\/\/wolorin.com\/es\/function\/pressure-rollers\/\">Rodillos de presi\u00f3n<\/a> \u2014 For nip contact, pressure distribution, pressure marks, and sensitive surface contact.<\/li><li><a href=\"https:\/\/wolorin.com\/es\/company\/quality-control\/\">Control de calidad<\/a> \u2014 For roller inspection direction, surface checks, dimensional checks, and pre-shipment confirmation.<\/li><li><a href=\"https:\/\/wolorin.com\/es\/applications\/film-converting-rollers\/\">Rodillos para conversi\u00f3n de pel\u00edcula<\/a> \u2014 For thin film, protective film, release film, and other web materials sensitive to roller marks.<\/li><li><a href=\"https:\/\/wolorin.com\/es\/function\/guide-rollers\/\">Rodillos gu\u00eda<\/a> \u2014 For web path control, edge stability, tracking movement, and repeated side contact.<\/li><\/ul>\t\t\t\t\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-17821843 e-flex e-con-boxed e-con e-parent\" data-id=\"17821843\" 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-591fd94 elementor-widget elementor-widget-heading\" data-id=\"591fd94\" 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<h2 class=\"elementor-heading-title elementor-size-default\">Fabricaci\u00f3n de rodillos a medida y control de calidad<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1f9275c0 elementor-widget elementor-widget-text-editor\" data-id=\"1f9275c0\" 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 data-start=\"186\" data-end=\"393\">Un rodillo de caucho fiable no solo depende de su tama\u00f1o. La direcci\u00f3n del compuesto, la estabilidad de la dureza, el grosor de la cubierta, el acabado superficial, la estructura del eje y la precisi\u00f3n de funcionamiento influyen en el rendimiento del rodillo en la l\u00ednea de producci\u00f3n.<\/p><p data-start=\"395\" data-end=\"675\">Wolorin ofrece servicios tanto para el reemplazo rutinario de rodillos como para proyectos personalizados m\u00e1s exigentes, con procesos de fabricaci\u00f3n, inspecci\u00f3n y controles de calidad documentados que se ajustan a los requisitos de cada proyecto. A continuaci\u00f3n, puede consultar nuestro alcance de servicios, nuestro proceso de control de calidad y nuestra trayectoria empresarial.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-353056d5 e-con-full e-flex e-con e-child\" data-id=\"353056d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6c2640a1 elementor-widget elementor-widget-button\" data-id=\"6c2640a1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/wolorin.com\/es\/services\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Servicios<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-19f71b7a elementor-widget elementor-widget-button\" data-id=\"19f71b7a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/wolorin.com\/es\/company\/quality-control\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Control de calidad<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11ea8345 elementor-widget elementor-widget-button\" data-id=\"11ea8345\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/wolorin.com\/es\/company\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Acerca de Wolorin<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5b14fae3 e-flex e-con-boxed e-con e-parent\" data-id=\"5b14fae3\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-5a871cf9 e-con-full e-flex e-con e-child\" data-id=\"5a871cf9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-262df516 elementor-widget elementor-widget-heading\" data-id=\"262df516\" 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<h2 class=\"elementor-heading-title elementor-size-default\">Solicitar presupuesto<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d68cce elementor-widget elementor-widget-text-editor\" data-id=\"8d68cce\" 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 class=\"isSelectedEnd\">Si ya dispone de planos, medidas, muestras o especificaciones claras, puede envi\u00e1rnoslos directamente. Podemos proceder con la fabricaci\u00f3n a medida, la cotizaci\u00f3n o la confirmaci\u00f3n de producci\u00f3n bas\u00e1ndonos en su documentaci\u00f3n.<\/p><p>If the information is not complete yet, you can still start with old roller photos, roller position, product type, contact media, repeat mark spacing, and the current problem. Photos showing several repeated marks with a ruler are especially useful.<\/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-1b1e7808 e-con-full e-flex e-con e-child\" data-id=\"1b1e7808\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-39cea31f elementor-widget elementor-widget-button\" data-id=\"39cea31f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/wolorin.com\/es\/contact-us\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Contacto<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-11b74e7c elementor-widget elementor-widget-button\" data-id=\"11b74e7c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/wolorin.com\/es\/send-drawings\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Enviar planos o datos del rodillo<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"<p>Why Do Repeat Marks Appear on Web Materials? A repeat mark often shows up after winding, rewinding, slitting, coating, laminating, or final inspection. The web may look normal in some areas, then the same short mark, shadow, dull spot, pressure band, or small surface defect appears again along the roll. For film, paper, foil, nonwoven, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"page-builder","ast-site-content-layout":"full-width-container","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":"disabled","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-4234","post","type-post","status-publish","format-standard","hentry","category-blog"],"_links":{"self":[{"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/posts\/4234","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/comments?post=4234"}],"version-history":[{"count":4,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/posts\/4234\/revisions"}],"predecessor-version":[{"id":4238,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/posts\/4234\/revisions\/4238"}],"wp:attachment":[{"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/media?parent=4234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/categories?post=4234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wolorin.com\/es\/wp-json\/wp\/v2\/tags?post=4234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}