Postal blue ink with improved durability

Details Postal blue ink with improved durability Postal blue ink with improved durability

2011-07-05

2011-07-05

Klemanski, Helene (Department: 1734)

Compositions: coating or plastic

Coating or plastic compositions

Marking

C106S031580, C106S031600, C106S031860

Reexamination Certificate

active

07972425

ABSTRACT:
A water-based ink for inkjet recording exhibits a blue color defined as L*<45, 25<C*<28, 255<h<278, and comprises a mixture of dyes and pigments, specifically including C.I. Pigment Blue 60 and C.I. Acid Blue 90, with water and a water-soluble organic solvent. The blue ink provide an image which has good water resistance and high optical density.

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International Standard ISO 2835, Prints n printing inks—Assessment of light fastness, First edition-Mar. 1, 1974, UDS 667.5.019.23, Ref. No. ISO 2835-1974 (E) , total No. of pages 5.

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