Pressure sensitive carbonless imaging system incorporating uncolored ferric organophosphates and colored chelates
First Claim
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1. A pressure sensitive imaging system comprising a substrate having coated on one surface thereof or disposed therein a first component comprising a colored chelate selected from aromatic or alkyl ligands having either neutral donors or at least one ionizable hydrogen, or both, and which react with iron (III) to form colored complexes;
- , and a second component in such physical relationship with said substrate that said second component will contact said first component upon the application of pressure to said substrate, said second component comprising a colorless ferric iron compound selected from ferric organophosphates, ferric organophosphinates, and ferric organophosphonates which react with said colored chelate upon contact to form a visible color.
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Abstract
Pressure sensitive imaging materials are stable until pressure addressed, but thereafter provide an intense dark image. The materials comprise colorless ferric organophosphate, ferric organophosphinate, or ferric organophosphonate and a colored chelate.
41 Citations
22 Claims
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1. A pressure sensitive imaging system comprising a substrate having coated on one surface thereof or disposed therein a first component comprising a colored chelate selected from aromatic or alkyl ligands having either neutral donors or at least one ionizable hydrogen, or both, and which react with iron (III) to form colored complexes;
- , and a second component in such physical relationship with said substrate that said second component will contact said first component upon the application of pressure to said substrate, said second component comprising a colorless ferric iron compound selected from ferric organophosphates, ferric organophosphinates, and ferric organophosphonates which react with said colored chelate upon contact to form a visible color.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of generating a visible image on the surface of a substrate, said image comprising a representation of the characteristic pattern of raised and recessed portions of the external surface of the skin covering the hands, fingers, feet and toes of the human body, comprising:
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(a) providing a first substrate, selected from the group consisting of the hands, fingers, feet and toes of the human body, having coated thereon a component comprising a colored chelate selected from aromatic or alkyl ligands having either neutral donors or at least one ionizable hydrogen, or both and which react with iron (III) to form colored complexes; (b) providing a second substrate having coated thereon a component comprising a colorless ferric iron compound selected from ferric organophosphates, ferric organophosphinates and ferric organophosphonates which react with said colored chelate upon contact to form a visible color; and (c) pressing said first and second substrates together such that said colored chelate contacts said colorless ferric iron compound and reacts therewith to form a visible colored image on the surface of said second substrate comprising a representation of said characteristic pattern on the surface of said first substrate.
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22. A method of generating a visible image on the surface of a substrate, said image comprising a representation of the characteristic pattern of raised and recessed portions of the external surface of the skin covering the hands, fingers, feet and toes of the human body, comprising:
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(a) providing a first substrate having coated thereon a component comprising a colored chelate selected from aromatic or alkyl ligands having either neutral donors or at least one ionizable hydrogen, or both, and which react with iron (III) to form colored complexes; (b) providing a second substrate, selected from the group consisting of the hands, feet, fingers and toes of the human body, having coated thereon a component comprising a colorless ferric iron compound selected from ferric organophosphates, ferric organophosphinates and ferric organophosphonates which react with said colored chelate upon contact to form a visible color; and (c) pressing said first and second substrates together such that said colored chelate contacts said colorless ferric iron compound and reacts therewith to form a visible colored image on the surface of said first substrate comprising a representation of said characteristic pattern on the surface of said second substrate.
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Specification