Method for producing a color effect on textile material
AssigneeClariant Finance (BVI) Limited
InventorMichael W. Dixon
Life of this patent
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Abstract
A desired color shade is produced on a textile substrate by treating a dyed textile substrate, which has an initial color shade which is partly due to color caused by the presence thereon of a vat dye and partly due to color caused by the presence thereon of a sulfur dye, with a chlorine-free decolorizing agent, such as hydrogen peroxide in an aqueous alkaline medium, whereby the color shade of the substrate is changed from said initial color shade to said desired color shade by removal therefrom of a proportion of the color attributable to the sulfur dye without removing as large a proportion of the color attributable to the vat dye.
Claims43
A method for producing a textile material having a desired color shade which comprises treating a dyed fibrous textile substrate, which has an initial color shade which is partly due to color caused by the presence of fibers dyed with a vat dye other than a sulfurized vat dye and partly due to color caused by the presence of fibers dyed with a sulfur dye which may be a sulfurized vat dye, with an amount of a chlorine-free decolorizing agent which is effective to change the color shade of said substrate from said initial color shade to said desired color shade by removing a proportion of the color attributable to the sulfur dye from fibers dyed therewith without removing as large a proportion of the color attributable to the vat dye.
Dependencies are inferred from the claim text.