Pigment inks for ink jet printers
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United States of America Patent
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Jan 13, 1998
Grant Date -
N/A
app pub date -
Nov 8, 1996
filing date -
Nov 8, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A pigmented ink for ink jet printer which comprises pigment particle as a colorant, water or a mixture of water and at least one hydrophilic organic solvent as a carrier medium and a derivative of polyoxyethylene ether sulphate or a derivative of polyoxyethylene ether phosphate as a dispersant. These inks give images having good print quality and excellent storage stability after many thermal cycles of -20.degree. C. to 80.degree. C.
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