| 摘要 |
FIELD: marking and identification of protected articles, such as bank-notes, service papers, labels, foil, fiber, card or industrial products. ^ SUBSTANCE: proposed printing ink contains dyes or pigments of expanded or hyperchromatic color space which is not reproduced by means of standard 4-color reproducing equipment. Identification of marking includes mathematical conversion of non-processed spectral information into statically independent hyperchromatic coordinates and comparison of selected hyperchromatic coordinates with respective standard magnitudes. Specification gives also description of printing inks and method of marking and identification of articles. ^ EFFECT: enhanced efficiency. ^ 25 cl, 6 dwg, 2 tbl, 4 ex |
