Ink and fixer fluid compositions having a charged buffer

Details Ink and fixer fluid compositions having a charged buffer Ink and fixer fluid compositions having a charged buffer

2007-01-09

2007-01-09

Shah, Manish S. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Fluid or fluid source handling means

C347S100000

Reexamination Certificate

active

10688428

ABSTRACT:
A marking fluid or fixing fluid for inkjet printing consisting a buffering agent with both a first functional group with a pKa at most 1.0 units away from the pH of the marking fluid or fixing fluid and a second functional group with a pKa at least 2.0 pH units away from the pH of the marking fluid or fixing fluid such that at the marking fluid or fixing fluid pH the second functional group is in its completely charged form.

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patent: 2003/0082350 (2003-05-01), Tsao
patent: 0626428 (1994-11-01), None
patent: WO 89/09247 (1989-10-01), None

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