Ink composition
AssigneeSakura Color Products Corporation
InventorHisanori Fujita
Life of this patent
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Abstract
An ink composition according to the present invention comprises a pigment, a pigment dispersion resin, an non-aqueous ambient temperature non-volatile liquid removal agent and an non-aqueous ambient temperature volatile organic solvent, wherein the amount of the pigment dispersion resin relative to that of the pigment is within the range of from about 2 to about 10%. Methods of making the ink composition and methods of applying the ink composition to a writing board also are disclosed. The ink composition is superior in time-erasion performance independent of the object and/or surface of the writing board.
Claims16
An ink composition, comprising:
- a pigment;
- a pigment dispersion resin;
- an non-aqueous ambient temperature non-volatile liquid removal agent;
- and
- an non-aqueous ambient temperature volatile organic solvent, wherein said pigment dispersion resin is present in an amount, relative to that of said pigment, within the range of from about 2 to about 10% by weight.
A method of making an ink composition comprising:
- dissolving a pigment dispersion resin in an non-aqueous ambient temperature volatile organic solvent to form a solution;
- and
- adding to this solution a pigment particle and an non-aqueous ambient temperature non-volatile liquid removal agent to form an ink composition;
- whereby said pigment dispersion resin is present in an amount, relative to that of said pigment, within the range of from about 2 to about 10% by weight.
Dependencies are inferred from the claim text.