Using a standard printing plate, an image is printed onto a substrate with the use of a ultraviolet-curable cold foil adhesive. An ultraviolet dryer then cures the adhesive, which becomes tacky. Foil spools from an unwind and is nipped to a substrate. Foil sticks to the tacky adhesive on the substrate, and an image with a bright foil surface is created. Foil that does not adhere to the adhesive remains on a thin polyester liner, and waste is directed to a rewind spool. Because the adhesive is applied on press like a conventional ink, no expensive stamping die has to be created.
Once printed, the surface of cold foil images may be varnished, laminated, or encapsulated in order to provide a hard-wearing, durable surface.
Substrates
Some printing substrates are unsuitable for cold foil transfer. The best results are obtained on glossy coated papers and papers with a smooth surface. Weights from about 80 to 500 g/m^2 are possible."
"Cold foil evolved from hot foil stamping. Hot foil stamping is mostly used offline when foil is required on a preprinted substrate, such as in the manufacture of greeting cards and special occasion ribbons. Hot foil is economical but very slow. The types of graphics that can be applied are usually limited to text and bold images. Hot foil is not usable with heat-sensitive substrates such as polyethylene, vinyl, or shrink film"
- Through researching these methods of foiling i feel that I have been able to gain a stronger understanding of how this process works within
industry.
I feel that my designs for my book and over foiled products are not too inaccessible when it came to the industrial printing process.
I have found this process of research useful in terms of gaining and understanding of the process on a larger scale.
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