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Cold foil takes the idea of hot foil stamping and makes it more convenient and cost-effective. The cold foil functions like an additional ink and is actually a UV-curable, very fast lamination adhesive and can be bonded in-line in a single run using a printing plate for either flexographic web printing or offset sheet-fed printing.
Cold stamping, also known as press working, [1] is a manufacturing operation in which thermoplastics in sheet form are cold-formed using methods similar to those used in metalworking. [2] A precut thermoplastic sheet, possibly reinforced, is softened by heating to a temperature particular to the plastic in use.
UV inks for letterpress are in paste form, unlike flexo. Various manufacturers produce UV rotary letterpress machines, viz. Dashen, Nickel, Taiyo Kikai, KoPack, Gallus, etc. – and offer hot/cold foil stamping, rotary die cutting, flatbed die cutting, sheeting, rotary screen printing, adhesive side printing, and inkjet numbering.
Cold laminating processes are also used outside of the print industry, for example, coating sheet glass or stainless steel with protective films. Cold roll laminators are also used for laying down adhesive films in the sign-making industry, for example mounting a large print onto a board.
Standard household foil is typically 0.016 mm (0.63 mils) thick, and heavy-duty household foil is typically 0.024 mm (0.94 mils). Foil may have a non-stick coating on only one side. [9] Although aluminium is non-magnetic, it is a good conductor, so even a thin sheet reflects
The aluminum foil allows the flame to stay even and continuously radiate heat, as well as retain heat to help melt the leftover wax. Ellie Martin Cliffe, executive editor at our sister site, Taste ...