C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 11/12 (2006.01) C09D 11/00 (2006.01) C09D 11/10 (2006.01)
Patent
CA 2138863
An invisible ink has been discovered that utilizes an invisible or almost invisible substituted phthalocyanine dye in combination with selected waxes and resins. The resulting ink is one that has use in thermal printing and is transparent or almost transparent in white light, but is responsive to infra-redlight in the range of 720 to 1000 nm. The preferred waxes are polyethylene wax, natural paraffin wax and carnauba wax, and the preferred resin is ethyl vinyl acetate polymer.
Encre invisible comprenant une teinture contenant un pigment de phtalocyanine de substitution invisible ou presque invisible combinée à des cires et à des résines sélectionnées. L'encre résultante est utilisable en impression par transfert thermique, est transparente ou presque transparente à la lumière blanche, mais réagit aux rayons infrarouges de 720 à 1 000 nm. Les cires préférées sont la cire de polyéthylène, la cire de paraffine naturelle et la cire de carnauba, et la résine préférée est un polymère d'éthylvynilacétate.
Pitney Bowes Inc.
Sim & Mcburney
LandOfFree
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