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US 6,551,394 B2Granted
Recording liquid, printed product and ink jet recording method
AssigneeMitsubishi Chemical Corporation
InventorsTakashi Hirasa, Ken-ichiro Sasaki, Tetsuo Murayama
Life of this patent
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Abstract
A recording liquid characterized in that when it is printed with 100% duty and with a resolution of 600×300 dpi on an electrophotographic paper having a S.A.D (Surface Area Difference) of from 6.0 to 9.0 and a pH of from 6 to 8, the S.A.D. of the printed portion is at least 59.5.
Claims3
A recording liquid comprising:
- carbon black having a DBP oil absorption of at least 140 ml/100 g and an average particle size of from 0.01 to 0.4 μm and having a pH value in a range of from 6 to 9;
- 5 to 15 wt. % of a dispersant based on said carbon black;
- and
- an aqueous medium,
- wherein the dispersant is a polymeric dispersant.
2 more elements
Dependencies are inferred from the claim text.