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US 5,006,171 AGranted
Ink eradicator for inks containing triaryl methane dyestuffs
AssigneePelikan Aktiengesellschaft
InventorsNorbert Mecke, Albert Schmedes
Life of this patent
Estimating the term…
Abstract
An aqueous ink eradicator solution for inks utilizing triaryl methane dyestuff and containing a reducing sulfur compound. the ink contains 20 to 50% by weight of sugar and/or a solid sugar alcohol and the reducing sulfur compound in an amount of 0.5 to 5% by weight.
Claims20
An aqueous ink eradicator solution for decoloring a triarylmethane dyestuff ink on a substrate, comprising:
- (a) substantially 2 to 50 wt % of a sugar component selected from the group consisting of at least one sugar, at least one solid sugar alcohol and mixtures thereof;
- and
- (b) substantially 0.1 to 5 wt % of a reducing sulfur component consisting of at least one reducing sulfur compound.
Dependencies are inferred from the claim text.