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:
Jan. 28, 2003
Filed:
Sep. 27, 2001
Applicant:
Inventors:
Tomomi Yoshizawa, Tokyo, JP;
Yasuhiko Kawashima, Tokyo, JP;
Assignee:
Konica Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 1/100 ;
U.S. Cl.
CPC ...
G01D 1/100 ;
Abstract
An ink set for ink-jet recording comprising a group of inks exhibiting the same hue and having different color densities and containing a colorant, water-soluble organic solvent and water, wherein among the group of inks, an ink has a largest surface tension &sgr;1 and another ink has a smallest surface tension &sgr;2,and said &sgr;1 and said &sgr;2 satisfy the following conditional formula: &sgr;2/&sgr;1>0.7, and wherein at least one of the inks contains iron ions, magnesium ions, calcium ions such that a total amount of the iron ions, the magnesium ions and the calcium ions is not more than 10 ppm by weight.