Cold Foil for QR Code Security Labels / 二维码防伪标签冷烫怎么保证可扫
## Quick Answer Cold Foil for QR Code Security Labels should be specified by process route, substrate, adhesive or UV varnish compatibility, artwork detail, and finished-package durability. For security label suppliers, the safest buying path is to test the foil on holographic and metallic label stock, using the actual machine route for QR code security labels and authentication seals. The main purchasing risk is scan contrast, registration, and abrasion resistance. Do not approve a cold foil roll by color alone; approve it by transfer completeness, edge clarity, gloss, adhesion, rub resista…