Planographic printing ink

Details Planographic printing ink Planographic printing ink

1979-08-23

1981-12-08

Pertilla, Theodore E.

Compositions: coating or plastic

Coating or plastic compositions

Metal-depositing composition or substrate-sensitizing...

106 22, 106 23, 106 24, 106 26, 106 30, 260 33, 260 6, 260 9, 260 16, 260 22CQ, 260 22S, 260 336SB, 260DIG38, C09D 1106, C09D 1110

Patent

active

043046010

ABSTRACT:
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-viscosities 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.degree. F. to 125.degree. F., and preferably, avoids becoming pseudoplastic at temperatures up to about 140.degree. F. or more.

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Ranney, "Why Silicones Are Used in Inks," Reprinted from American Ink Maker, May, 1968.

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