The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 26, 1991
Filed:
Jan. 23, 1989
Boyd R Beck, Spring City, UT (US);
Robert D Harris, Cameron Park, CA (US);
Harris Research, Inc., Cameron Park, CA (US);
Abstract
Solutions and method for the solubilizing and removal of dyes, synthetic red dyes in particular, are disclosed. The solutions consist of an aqueous mixture containing as essential ingredients (1) a detergent, preferably anionic, (2) a sulfite or bisulfite, (3) a lower alcohol and (4) ammonia or an amine. The combined ingredients cooperate to chemically alter the dye chromophore causing it to become soluble. The dye is removed by placing the solution on fibers stained with the dye for a time sufficient to allow the dye to be made soluble and the solution is then removed by either suction or absorption. Some dyes require treatment of the fiber with a solution followed by the application of moist heat through an absorbent material to assist in solubilizing and transferring the dye to the absorbent material. Particularly preferred are solutions consisting of 0.1-6% w. of a lauryl sulfate detergent salt, 5-15% w. of a sulfite or bisulfite, 20-40% w. of ethanol or methanol or a mixture thereof, and 2-10% w. of ammonia or a low alkyl or alkanol amine.