Cold Foil Varnish Thickness: Why More Is Not Always Better / 冷烫光油越厚越好吗
## Quick Answer Cold Foil Varnish Thickness: Why More Is Not Always Better should be specified by process route, substrate, adhesive or UV varnish compatibility, artwork detail, and finished-package durability. For process engineers, the safest buying path is to test the foil on UV varnish layer and foil carrier, using the actual machine route for labels, cartons, and screen cold foil jobs. The main purchasing risk is spread, cure depth, edge sharpness, and foil pickup. Do not approve a cold foil roll by color alone; approve it by transfer completeness, edge clarity, gloss, adhesion, rub res…