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How to Diagnose Printing Defects on PP, PE and PET Films
- 2026-08-28 17:54:10
- admin
Printing problems on plastic film do not always come from the same part of the process. Ink may shrink immediately after transfer. A printed layer may look normal but fail a tape test after drying. Some problems only appear after water exposure, rubbing or when the press reaches normal production speed. During troubleshooting, it is useful to record when the defect first appears before changing se...
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What Is the Purpose of Varnishing in Printing
- 2026-09-10 17:57:39
- admin
Varnish is one of the “unsung heroes” of the printing process. Many people think it is only used to make paper look glossier, but it actually serves many other purposes. Simply put, applying varnish to a printed product is like giving it a functional outer layer. It protects the printed image while helping the product withstand friction, moisture, stains, and further processing. First, the Most Pr...