Aqueous black ink composition for writing board

Details Aqueous black ink composition for writing board Aqueous black ink composition for writing board

1996-12-04

1999-05-18

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

106 3113, C09D5/00

Patent

active

059051027

ABSTRACT:
The present invention provides an aqueous black ink composition for a writing board which hardly causes thickening, coagulation of the pigment, decreasing of writing density due to sedimentation, clogging in a penpoint, and break in writing. The aqueous black ink composition comprises water, the oxidized carbon black obtained by oxidizing carbon black using hypohalogenous acid and/or salt thereof, a film forming agent, and a release agent.

REFERENCES:
patent: 4444866 (1984-04-01), Sakai
patent: 5395435 (1995-03-01), Mizobuchi
patent: 5609671 (1997-03-01), Nagasawa
patent: 5718746 (1998-02-01), Nagasawa

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