heat sensitive vinyl foi, Hot Stamping Foil (ASKH)

Foil stamping uses heat and hot stamping foil in a specialty printing process that produces a shiny design on paper, vinyl, textiles, wood, hard plastic, leather, and other materials. Foil stamping also called hot stamping, dry stamping, foil imprinting, or leaf stamping, can be combined with dimensional embossing to make letters and images on business cards, book covers, gift cards, office folders, and a whole host of professional or personal items.

Copyright @ sinolam 

Sinolam supply a simple hot stamping foil facings that HOT STAMPING FSKH(Foil-scrim-Kraft-Vinyl) Finishes, which is upgrade from FSK facing by spread hot melt adhesive on the surface of Kraft, just heat it before paste facing to glass wool or carrier. Other supplier also name it FSKV (V here means Vinyl as adhesive)
From above drawing (foil scrim kraft and hot stamping foil scrim kraft facing) we know another layer of adhesive exist in XSKH facing for heat sealing purpose.