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US 12,617,960 B2Granted
Washable ink composition
AssigneeSociete BIC
InventorCarine Bethouart
Life of this patent
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Abstract
The present invention concerns a washable aqueous ink composition comprising: a) at least one salt of monocarboxylic or polycarboxylic acid with from 3 to 8 carbon atoms, 5b) at least one salt of polyacrylic acid, c) at least one dye. It also concerns a writing instrument comprising it and the use of the association of a) at least one salt of monocarboxylic or polycarboxylic acid with from 3 to 8 carbon and b) at least one salt of polyacrylic acid, to improve the washability 10 and/or vividness of the shades of a washable aqueous ink composition.
Claims20
An aqueous ink composition, comprising:
- a combination of:
- at least one salt of monocarboxylic or polycarboxylic acid with from 3 to 8 carbon atoms, and
- at least one salt of polyacrylic acid;
- and
- at least one water soluble dye,
- wherein the aqueous ink composition is washable.
3 more elements
Dependencies are inferred from the claim text.