The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 1998
Filed:
Jun. 27, 1997
Tomoko Matsuura, Inashiki-gun, JP;
Teruaki Okawa, Inashiki-gun, JP;
Riso Kagaku Corporation, Tokyo, JP;
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.