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US 8,557,510 B2Granted
Colour forming composition
AssigneeDatalase Ltd.
InventorsMartin Walker, Anthony Jarvis
Life of this patent
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Abstract
A composition comprising i) a color forming component which is susceptible to changing color when irradiated; ii) an amine neutralised alkylaromatic sulphonic acid; and iii) a binder. Methods of marking a substrate comprising incorporating within or applying to a substrate the composition of this invention, and substrates coated with the composition, are also provided.
Claims16
A composition comprising:
- i) a colour forming component which is susceptible to changing colour when irradiated;
- ii) an amine neutralized alkylaromatic sulphonic acid;
- and
- iii) a binder,
- wherein the amine neutralized alkylaromatic sulphonic acid is a polyalkylnaphthalene polysulphonic acid derivative.
2 more elements
Dependencies are inferred from the claim text.