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:
Apr. 14, 1998
Filed:
Dec. 05, 1996
Applicant:
Inventors:
Sadanao Okuda, Inashiki-gun, JP;
Yoshihiro Hayashi, Inashiki-gun, JP;
Assignee:
Riso Kagaku Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 3126 ; 106 3165 ; 106 319 ;
Abstract
A water-in-oil (W/O) emulsion ink for stencil printing, high in printing density, low in seep through and blurring and excellent in temperature stability, is provided, which contains carbon black as a water-insoluble colorant in the water phase, in which said carbon black has a pH value of 6 to 10. The carbon black is preferably 10 .mu.m or less in average particle diameter. The water phase may contain an oil-in-water (O/W) emulsion of resin and/or a water-soluble resin to improve dispersion of carbon black in water and its fixation to prints. The oil phase may be free from any resinous component.