Medium for emulsion ink for stencil printing

Details Medium for emulsion ink for stencil printing Medium for emulsion ink for stencil printing

1997-06-27

1998-12-29

Klemanski, Helene

Compositions: coating or plastic

Coating or plastic compositions

Marking

106 316, 106 319, C09D 1102

Patent

active

058534660

ABSTRACT:
A medium for water-in-oil (W/O) emulsion ink for stencil printing is provided, which is useful for diluting the emulsion ink to obtain a transparent and pale color ink without lowering viscosity of the ink. The medium is a water-in-oil (W/O) emulsion comprising an oil phase and a water phase, in which the medium contains an extending pigment in the oil phase but is free from coloring pigments. The medium preferably has an optical density value of 1.4 or more as measured by a reflection densitometer when the medium is applied and dried in a thickness of 50 .mu.m onto a transparent sheet placed on a black standard board, and has 32 or less of flow value in one minute as measured by a spreadometer. The extending pigment preferably constitutes 1 to 5% by weight of the total weight of the medium, and may be inorganic fine particles or organic fine particles that are insoluble in said oil phase. The inorganic fine particles may be those subjected to lipophilic treatment.

REFERENCES:
patent: 4585815 (1986-04-01), Ono et al.
patent: 5378739 (1995-01-01), Koike et al.
patent: 5637137 (1997-06-01), Okuda et al.
patent: 5667570 (1997-09-01), Okuda et al.
Derwent Publications Ltd., Abstract, JP 05 070 730, Mar. 23, 1993, Section Ch, Week 9317, London, GB.

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