Ozone decolorization of garments
AssigneeEric Wasinger
InventorsEric Wasinger, David Hall
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Abstract
A process for selectively decolorizing a garment containing cellulosic material which comprises the steps of providing said garment with a dye or coloring agent reactive to ozone, wetting said garment and then contacting said wetted garment with ozone or a mixture of steam and ozone whereby the ozone is reacted with the dye or coloring agent.
Claims20
A process for selectively decolorizing a garment containing cellulosic material having warp yarn which comprises the steps of providing said garment with an ozone oxidizable dye, wetting said garment, and then contacting said wetted garment in a vapor phase with a mixture of steam and ozone at elevated temperatures for a selected period of time whereby the ozone oxidizes said dye, and then terminating the oxidation with the ozone prior to any substantial oxidation of the warp yarn of the cellulosic material.
A process for selectively oxidizing a garment containing cellulosic material having warp yarn without any substantial oxidation of the warp yarn comprising the steps of:
- A. providing said garment with a dye which is capable of being oxidized by ozone;
- B. wetting said garment;
- C. contacting said wetted garment in a vapor phase with a mixture of steam and ozone at a temperature between about 40.degree. and 100.degree. C.;
- D. sensing the degree of oxidation of said dye by the color change of the garment with a spectrophotometer;
- and then
- E. terminating the oxidation with ozone when a predetermined color of the garment is obtained and before any substantial degradation of the warp yarn of the cellulosic material by said ozone.
Dependencies are inferred from the claim text.