Heat stable ir scannable waterfast inks for ink jet printers

Details Heat stable ir scannable waterfast inks for ink jet printers Heat stable ir scannable waterfast inks for ink jet printers

C - Chemistry, Metallurgy

09

D

C09D 11/10 (2006.01) C09D 11/00 (2006.01)

Patent

CA 2185839

An ink jet ink composition comprises a liquid vehicle, a primary dye, a sulfur black dye, a polymer, and at least one water soluble organic solvent for enhancement of waterfastness. The ink preferably comprises 1% ethoxylated polyethyleneimine to which is added 2% N-methyl- pyrrolidone, to increase the waterfastness of the ink to a level greater than 90%. The presence of at least 4% of a 10% liquid sulfur black dye provides heat stability to the ink. An additional approximately 6% to 8% of the 10% liquid sulfur black dye can be provided to make the ink both heat stable and infrared scannable.

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