| 摘要 |
FIELD: process engineering.SUBSTANCE: invention relates to production of protective films applied on valuable documents or data carriers. This film features the following structure: a) first carrier substrate; b) first lacquer layer hardened by radiation and including active optical structure; c) first metal layer; d) protective lacquer layer; e) gluing layer; f) second carrier substrate; g) second lacquer layer hardened by radiation; h) second metal layer. If necessary, this film comprises protective lacquer layer (i) and glue coat (k). Note here that adhesion between g) and h) or f) and g) is notably higher than that between the other layers.EFFECT: detection of manipulation at protected object.9 cl, 6 dwg |
