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Water base ink for ink-jet recording
   
Document Number
US Patent 7169221
Issued Date
January 30, 2007
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Abstract
A water base ink for ink-jet recording contains 0.1% by weight to 4.0% by weight of C.I. Direct Yellow 132; not less than 0.5% by weight of glycol ether having a melting point of not more than -45.degree.C.; and a water-soluble organic solvent in which a solubility of C.I. Direct Yellow 132 at 20.degree. C. is not less than 5%. The ink satisfies 0.2.ltoreq.B/A and 3.ltoreq.C/A. B/A represents a weight ratio of the glycol ether to the C.I. Direct Yellow 132 contained in the ink, and C/A represents a weight ratio of the water-soluble organic solvent to the C.I. Direct Yellow 132 contained in the ink. The stability in long-term storage after the evaporation of water or at low temperatures can be obtained even when C.I. Direct Yellow 132 is used in the water-base ink for the ink-jet recording.
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Number of Claims:
12
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Owner
Published
January 30, 2007
Application Number
11/149,155
Filed
June 10, 2005
US Classification
106/31.58   106/31.59
Int'l Classification
C09D   11/02   (20060101)  
Attorney/Law Firm
Priority Data
Jun 18, 2004 [JP] 2004-181581
USPTO Field of Search
106/31.58   106/31.59  
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