Preparation of security film comprising translucent carrier film with partially coated top layer, used for preparation of security films, e.g. for security paper carrying letters, numbers, signs, dots, or patterns

摘要

The preparation of a security film for security paper comprising a translucent carrier film with a partially coated top layer comprises the preparation of the carrier film, printing of this with a high pigment printing ink, which is dried to form a colored coating (CC), the formation of a thin top layer on the printed carrier film, removal of the CC by solvent washing and mechanical action of a textile surface structure (sic), and drying and trimming of the carrier film. Independent claims are included for the following: (a) a safety film prepared as above; and (b) a device for carrying out the process using a washing device which includes a textile surface structure.