Ink composition and printing method using the same

Details Ink composition and printing method using the same Ink composition and printing method using the same

C - Chemistry, Metallurgy

09

D

C09D 11/00 (2006.01) B41M 5/00 (2006.01)

Patent

CA 2603276

This invention provides an ink composition comprising a silver colloid and an antitarnish agent for preventing discoloration of silver. Despite the use, as a colorant, of a silver colloid which is likely to discolor, discoloration of the printing face in a relatively short period can be prevented, and good metal gloss of the printing face can be maintained over a longer period of time than attained by the prior art technique.

Cette invention prévoit une composition d~encre comprenant un colloïde d~argent et un agent anti-ternissure pour empêcher la décoloration de l~argent. Malgré l~utilisation, comme colorant, d~un colloïde d~argent qui se décolorera probablement, la décoloration de la face d~impression à relativement court terme peut être empêchée, et un bon éclat métallique de la face d~impression peut être conservé plus longtemps par rapport à la technique de l~art antérieur.

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