Normal Corona Value Range for Hot Stamping<\/h2>\n\n\n\n
The normal corona value<\/a><\/strong> for reliable hot stamping on BOPP is 38\u201342 dynes\/cm. A minimum of 38 dynes\/cm is required for basic foil adhesion. Most converters aim for 40\u201342 dynes\/cm to achieve strong, consistent bonding. Levels below 38 dynes\/cm almost always cause peeling or incomplete transfer. Higher values around 42 dynes\/cm work well for demanding UV and foil applications.<\/p>\n\n\n\n Insufficient corona value is the most common reason for peeling. When the dyne level stays below 38 dynes\/cm<\/strong>, the foil cannot form a strong bond. Heat and pressure during stamping cannot overcome the weak surface energy. The foil lifts, cracks, or peels after cooling or light rubbing. Other factors like incorrect temperature or pressure can add to the problem, but low corona remains the root cause in most cases.<\/p>\n\n\n\n Low-corona BOPP creates quality and cost issues. Finished products show visible foil defects. Scrap rates rise. Customers reject batches. Rework or reprinting becomes necessary. In packaging and labels, this damages brand appearance and reliability.<\/p>\n\n\n\n High-corona BOPP film keeps surface energy in the proper 38\u201342 dynes\/cm range for hot stamping and UV. The treated surface accepts foil cleanly and holds it firmly. Results stay consistent across runs. SZ Film Factory produces high-end BOPP films<\/a><\/strong> with sufficient and stable corona values. These films meet the demands of hot stamping<\/a>, UV coating<\/a>, and related processes. They help avoid peeling and deliver clean, durable finishes.<\/p>\n\n\n\n Our BOPP range includes films suitable for decorative and functional packaging needs. Proper corona treatment is built into the production process so adhesion performs as required.<\/p>\n\n\n\n Need reliable BOPP for hot stamping? Contact us for samples or technical details at info@szfilmfactory.com<\/strong><\/a>.<\/p>\n\n\n\n Select BOPP with verified corona levels of 38\u201342 dynes\/cm<\/a><\/strong> that match your stamping process. Check surface energy with dyne pens before production. Test adhesion under real heat and pressure conditions. Work with a supplier that controls corona treatment tightly and supplies consistent high-end film.<\/p>\n\n\n\n SZ Film Factory focuses on BOPP and PET film<\/a><\/strong>s engineered for demanding applications. Our films support hot stamping, UV, and related finishes without the peeling problems linked to low corona.<\/p>\n\n\n\n Ready for stable hot stamping results? Reach out for a quote or arrange a factory visit. Email info@szfilmfactory.com<\/strong><\/a> or use the contact form<\/a><\/strong> on our site. We help you choose the right high-corona BOPP for clean, lasting foil adhesion.<\/p>\n\n\n\n <\/p>","protected":false},"excerpt":{"rendered":" Low corona treatment is the top reason hot stamping foil peels from BOPP film. The normal range is 38\u201342 dynes\/cm. Proper surface energy ensures strong adhesion.<\/p>","protected":false},"author":1,"featured_media":3565,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","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":[29],"tags":[31,44,35],"class_list":["post-3559","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-case-studies-tech-support","tag-bopp-film","tag-corona-treatment","tag-tech-support"],"uagb_featured_image_src":{"full":["https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/Foil-Peeling-on-BOPP-Film.jpg",600,400,false],"thumbnail":["https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/Foil-Peeling-on-BOPP-Film-150x150.jpg",150,150,true],"medium":["https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/Foil-Peeling-on-BOPP-Film-300x200.jpg",300,200,true],"medium_large":["https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/Foil-Peeling-on-BOPP-Film.jpg",600,400,false],"large":["https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/Foil-Peeling-on-BOPP-Film.jpg",600,400,false],"1536x1536":["https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/Foil-Peeling-on-BOPP-Film.jpg",600,400,false],"2048x2048":["https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/Foil-Peeling-on-BOPP-Film.jpg",600,400,false],"trp-custom-language-flag":["https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/Foil-Peeling-on-BOPP-Film-18x12.jpg",18,12,true]},"uagb_author_info":{"display_name":"Ivy","author_link":"https:\/\/szfilmfactory.com\/ru\/blog\/author\/szfilmoutlook-com\/"},"uagb_comment_info":0,"uagb_excerpt":"Low corona treatment is the top reason hot stamping foil peels from BOPP film. The normal range is 38\u201342 dynes\/cm. Proper surface energy ensures strong adhesion.","_links":{"self":[{"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/posts\/3559","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/comments?post=3559"}],"version-history":[{"count":8,"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/posts\/3559\/revisions"}],"predecessor-version":[{"id":3569,"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/posts\/3559\/revisions\/3569"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/media\/3565"}],"wp:attachment":[{"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/media?parent=3559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/categories?post=3559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/szfilmfactory.com\/ru\/wp-json\/wp\/v2\/tags?post=3559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Why Low Corona Value Causes Foil Peeling<\/h2>\n\n\n\n
Risks of Using Low-Corona BOPP for Hot Stamping<\/h2>\n\n\n\n
![\"logo](\"https:\/\/szfilmfactory.com\/wp-content\/uploads\/2026\/08\/logo_scattered_gold_dust.jpg\" "\\"Insufficient"){kind=logo}
<\/figure>\n\n\n\nHigh-Corona BOPP Solves the Problem<\/h2>\n\n\n\n
How to Choose the Right Film<\/h2>\n\n\n\n