Printing to produce matt and glossy surfaces, e.g. on an offset machine, involves printing with oil-based ink, coating some parts with matt ink containing a low-surface energy additive, then coating overall with gloss varnish

摘要

Substances with a low surface energy are added to the oil-based matt varnish or printing ink used in a printing process which involves printing or coating in succession with oil-based printing ink, matt varnish or ink (on parts of the printed surface) and transparent gloss varnish (over the whole printed surface). A printing process in which print material, in passing through a printing machine (2) with several printing groups (6, 8, 10, 12) followed by a varnishing group (14), is first printed with an oil-based printing ink (I) in at least one of the groups (6, 8, 10), then coated (in group 12) on parts of the printed surface with an oil-based matt varnish or printed with matt ink (II) (containing a dulling agent), and finally coated over the entire printed surface with a transparent gloss varnish (III) (in group 14). In this process, the matt varnish or matt ink (II) is modified by adding substance(s) (IV) with a low surface energy. An independent claim is also included for products printed on at least one side by this process, using oil-based offset printing ink.