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Infrared and Visual Absorbing Jet Inks

IP.com Disclosure Number: IPCOM000052928D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Potter, JM: AUTHOR [+4]

Abstract

Jet inks containing CALC0CID BLACK SR* dye for infrared absorption and SPECIAL BLACK G** dye, SPECIAL BLACK SP** dye or BLACK 7984** dye are effective and non-toxic jet inks operative in both the infrared and visual ranges. The following formulations are specific implementations: Formula 1 Material Percent by Weight SPECIAL BLACK G 16.0 CALCOCID BLACK SR 2.0 Butyl CARBITOL*** 2.0 CARBOWAX 200*** 5.0 2MB**** 6.0 Tetrasodium 0.2 Ethylnediametetraacetate(EDTA) Sodium OMADINE***** 0.1 Water Balance Viscosity: 2.27 centistokes Surface tension: 41.4 dynes/cm Optical density in print: 0.

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Infrared and Visual Absorbing Jet Inks

Jet inks containing CALC0CID BLACK SR* dye for infrared absorption and SPECIAL BLACK G** dye, SPECIAL BLACK SP** dye or BLACK 7984** dye are effective and non-toxic jet inks operative in both the infrared and visual ranges.

The following formulations are specific implementations: Formula 1 Material Percent by Weight SPECIAL BLACK G 16.0 CALCOCID BLACK SR 2.0 Butyl CARBITOL*** 2.0 CARBOWAX 200*** 5.0 2MB**** 6.0 Tetrasodium
0.2 Ethylnediametetraacetate(EDTA) Sodium OMADINE***** 0.1 Water Balance Viscosity: 2.27 centistokes Surface tension:
41.4 dynes/cm Optical density in print: 0.98 pH: 10 Formula 2 Material Percent by Weight SPECIAL BLACK SP 15.0 CALCOCID BLACK SR 2.0 2MB 6.0 CARBOWAX 200
5.0 Sodium OMADINE 0.1 EDTA 0.2 Ethylene-glycol-monobutyl ether 1.5 Water Balance Viscosity: 2.02 centistokes Surface tension: 36.0 dynes/cm Optical density in print: 1.00 pH: 10 Formula 3 Material Percent by Weight BLACK 7984 4.0 CALCOCID BLACK SR 2.0 Ethylene-glycol-monobutyl ether 1.5 CARBOWAX 200
5.0 2MB 6.0 Sodium OMADINE 0.1 EDTA 0.2 Water Balance Viscosity:
1.83 centistokes Surface tension: 39.6 dynes/cm Optical density in print: 1.03 pH: 10

A level of 2 percent by weight of the CALCOCID BLACK SR dye produces adequate near infrared absorption. The other dyes are used between 3 and 5 percent by weight to provide adequate optical absorption. SPECIAL BLACK G dye and SPECIAL BLACK SP dye are used in 20% solutions, as commercially distri...