Cold Foil Boiling Water and Heat Resistance Checks / 冷烫耐热和水煮测试是否需要
## Quick Answer Cold Foil Boiling Water and Heat Resistance Checks should be specified by process route, substrate, adhesive or UV varnish compatibility, artwork detail, and finished-package durability. For packaging engineers, the safest buying path is to test the foil on films, labels, and plastic packaging parts, using the actual machine route for products exposed to heat, steam, or wet handling. The main purchasing risk is thermal stress, humidity, and end-use simulation. Do not approve a cold foil roll by color alone; approve it by transfer completeness, edge clarity, gloss, adhesion, r…