Letterpress printing ink

Details Letterpress printing ink Letterpress printing ink

C - Chemistry, Metallurgy

09

D

6/30

C09D 11/06 (2006.01)

Patent

CA 1238454

ABSTRACT OF THE DISCLOSURE A non-petroleum base newspaper letterpress printing ink com- prising a blend of Gilsonite (uintaite) flakes and tall oil fatty acid together with carbon black pigment. The proportions of the Gilsonite and the tall oil fatty acid may be varied, as viscosity requirements change due to differences in press speeds, newsprint characteristics, and the like. The ink thus has readily adjust- able viscosity, together with an enhanced flow and penetration characteristics, while being extremely economical to manufacture.

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