22-03-2023 дата публикации
Номер: GB2610977A
A method for producing a security layered scratch-off protected document 400 with variable indicia wherein a first portion 405 of the variable indicia is formed with a pigmented based ink and a different second portion 404 of the variable indicia is formed with a dye based ink, the method comprises printing (503, Fig,5), with first fixed plates (602, Fig.6), lower security layers, comprising a lower opacity layer printed over a substrate and a higher contrast background layer; printing (504, Fig,5), with a first digital imager (603, Fig.6), the first portion of the variable indicia with the pigmented based ink; printing (505, Fig,5), with a second digital imager (604, Fig.6), the second portion of the variable indicia with the dye based ink; and printing (507, 508, 509, Fig,5), with second fixed plates (605, Fig.6), an upper security stack over at least some of the variable indicia. The upper security stack comprises a water based transparent or translucent seal coat, a direct energy cured transparent or translucent release coat and a Scratch-Off Coating (SOC). The variable indicia is printed on top of the lower security layers.
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