Colorant stabilizers
AssigneeKimberly-Clark Worldwide, Inc.
InventorsRonald Sinclair Nohr, John Gavin MacDonald
Life of this patent
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Abstract
The present invention is directed to an ink set of inks which have substantially identical light fastness properties. The ink set includes ink compositions containing a colorant and at least one colorant stabilizer. The colorant stabilizer imparts light-stability to the colorant so that the colorant does not fade when exposed to electromagnetic radiation such as sunlight or artificial light. The ink set provides a range of colored inks having similar light-stability.
Claims51
An ink set comprising two or more inks, wherein the inks of the ink set possess substantially similar light fastness properties, wherein one ink of the ink set comprises a magenta ink.
An ink composition comprising a colorant and at least one stabilizing agent, the at least one stabilizing agent comprising a porphine.
A method of making an ink set, wherein inks of the ink set possess substantially similar light fastness properties, the method comprising:
- providing an ink set comprising two or more inks, wherein one ink of the ink set comprises a magenta ink;
- and
- adding one or more colorant stabilizers to one or more inks of the ink set.
A method of stabilizing a colorant comprising:
- adding at least one stabilizing agent to an ink composition containing the colorant, the at least one stabilizing agent comprising a porphine.
An ink set comprising cyan, magenta and yellow inks, wherein the inks of the ink set possess substantially similar light fastness properties.
A composition comprising a colorant and at least one stabilizing agent, the at least one stabilizing agent comprising a porphine represented by the following formula ##STR66## wherein M is cobalt or copper;
- and wherein R is SO.sub.3 H, ##STR67## COOH, or R.sub.1 COOH wherein R.sub.1 is an alkyl group of from 1 to 6 carbons.
A method of making an ink set, wherein inks of the ink set possess substantially similar light fastness properties, the method comprising:
- providing an ink set comprising cyan, magenta and yellow inks;
- and
- adding one or more colorant stabilizers to one or more inks of the ink set.
A method of stabilizing a colorant comprising:
- adding at least one stabilizing agent to a composition containing the colorant, the at least one stabilizing agent comprising a porphine represented by the following formula ##STR70## wherein M is cobalt or copper;
- and wherein R is SO.sub.3 H, ##STR71## COOH, or R.sub.1 COOH wherein R.sub.1 is an alkyl group of from 1 to 6 carbons.
A composition comprising a colorant and at least two stabilizing agents, the at least two stabilizing agents comprising a porphine and a metal or metal salt.
A method of stabilizing a colorant comprising:
- adding at least two stabilizing agents to a composition containing the colorant, the at least two stabilizing agents comprising a porphine and a metal or metal salt.
An ink-receiving substrate comprising a substrate having a surface and a colorant composition on the surface, wherein the colorant composition comprises a porphine.
A method of printing onto an ink-receiving substrate comprising:
- providing a substrate having a surface;
- and
- applying a colorant composition onto the surface of the substrate, wherein the colorant composition comprises a porphine.
Dependencies are inferred from the claim text.