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US 11,666,084 B2Granted
Tobacco-derived colorants and colored substrates
AssigneeR.J. Reynolds Tobacco Company
InventorsCharles Stewart, Ercilia Hernandez Garcia, Robert Owen Bussey, III
Life of this patent
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Abstract
Methods for obtaining natural colorants from plant material (e.g., tobacco material) and for using such natural colorants to dye various substrates are provided. Natural colorants are obtained using particular enzymes and particular conditions (e.g., time, temperature, and pH profiles). Such colorants can be used to dye substrates, for example, using conventional dyeing techniques or using unique in situ methods.
Claims21
A colored substrate prepared according to a method comprising:
- providing a first tobacco mixture by combining a tobacco material with a cellulase and a beta glucosidase at a pH of about 5-6;
- providing a second tobacco mixture by adjusting the pH of the first tobacco mixture to a pH of about 7-8 and adding pectate lyase and xylanase to the first tobacco mixture;
- separating the tobacco material from the second tobacco mixture to give a colorant-containing broth;
- and
- contacting a substrate with the colorant-containing broth to give the colored substrate,
- wherein the colored substrate exhibits color that is independent of lighting.
3 more elements
Dependencies are inferred from the claim text.