Planographic printing ink

Details Planographic printing ink Planographic printing ink

C - Chemistry, Metallurgy

09

D

400/1, 101/63

C09D 11/02 (2006.01) C09D 11/10 (2006.01)

Patent

CA 1073574

ABSTRACT OF THE DISCLOSURE A novel ink formulation, especially useful in Driography printing, is disclosed. The ink formulation comprises a basic planographic printing ink vehicle, a pigment, a modifying varnish and a flow control agent to provide an ink, especially suitable for use in Driography, which exhibits desirable handling-viscos- ities under ambient conditions, improved rheological properties under severe press-operating conditions, and provides printings having sharp delineation, fidelity and excellent reproducibility in depth of color tones in long press runs. The basic printing ink vehicle may be a vehicle designed for either sheet-fed or heat-set printing systems. The novel ink formulation is designed to have a high viscosity and avoid becoming pseudoplastic in its behavior at higher press temperatures, which generally can range from about 85°F. to 125°F. and preferably, avoids becoming pseudoplastic at temperatures up to about 140°F. or more.

253858

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