Coloring process and colored articles
AssigneeDynapol
InventorNicolo Bellanca
Life of this patent
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Abstract
Translucent substrates such as foodstuffs are colored by adding polymeric dyes. The dyes contain from 0.1 to 2.0 parts of nonchromophoric material for each part by weight of chromophore and are added in a weight amount equivalent to from 0.4 to 0.9 times the weight of monomeric chromophore required to give the equivalent visual shade.
Claims7
A colored edible product comprising a translucent edible substrate having dissolved therein polymeric dye in a weight sufficient to yield a desired shade, said polymeric dye having a molecular weight of from about 2000 to 400,000 and consisting of one part by weight of chromophoric groups represented by Ch joined together by from 0.1 to 2 parts by weight of nonchromophoric linking groups represented by B into a structure represented by a structural formula selected from -- Ch B --.sub.n and ##EQU2## wherein n is an integer greater than 1, said weight of polymeric dye being from about 0.4 to 0.9 times the weight of monomeric chromophoric groups Ch necessary to yield said desired shade.
The process for coloring a translucent edible substrate to a desired shade which comprises dissolving in said edible substrate a weight of polymeric dye;
- said polymeric dye consisting of one part by weight chromphoric groups respresented by Ch, joined together by from 0.1 to 2 parts by weight of nonchromophoric linking groups represented by --B-- into a polymer represented by a structural formula selected from -- CH B --.sub.n and ##EQU3## wherein n is an integer greater than 1, said weight of polymeric dye being from about 0.4 to 0.9 times the weight of monomeric chromophoric groups necessary to achieve said desired shade.
Dependencies are inferred from the claim text.