| 摘要 |
FIELD: multi-layered body and method for producing multi-layered image in such a multi-layered body. ^ SUBSTANCE: multi-layered body contains two layers sensitive to laser radiation with partial overlapping. First and second laser radiation sensitive layers contain colorant, which under effect of laser radiation loses color or under effect of laser radiation changes its color, or laser radiation sensitive layer contains alloyed material, which under effect of laser radiation is subject to blackening. In first layer sensitive to laser radiation a multi-layered laser-induced component part of image may be formed, while in second laser radiation sensitive layer black marking may be formed, preferably a grayscale image, and/or special background layer at sections is located as intermediate layer between laser radiation sensitive layers and acts as locking layer, which is not transparent for laser radiation. In accordance to method of forming of multi-layered image in multi-layered body, multi-layered image is composed of several laser-induced components of image. ^ EFFECT: creation of multi-layered body, which realizes high degree of protection from forgery and special marking induced by laser. ^ 2 cl, 7 dwg |
