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US 5,295,998 AGranted
Adjusting pH in dyeing processes using CO.sub.2
AssigneeLiquid Carbonic Industries Corporation
InventorsRonald J. Merritello, William F. Kilgore, David M. Forstrom, Terence A. Lane
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Abstract
A method to establish, maintain and control pH using carbon dioxide in aqueous dyeing processes applicable to dyeing a wide range of substrates with an aqueous dyeing solution incorporating either a water soluble or insoluble, natural or synthetic type of dye in batch or continuous processes, and at atmospheric pressure or under pressure.
Claims13
A method for dyeing a substrate comprising the steps of:
- providing a dye solution suitable for dyeing a substrate wherein said dye solution uses at least some water as a transport medium;
- controlling the pH of said dye solution by introducing CO.sub.2 into said solution;
- and
- applying said dye solution to said substrate.
1 more element
Dependencies are inferred from the claim text.