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:
Nov. 19, 2013
Filed:
Aug. 17, 2011
Su Hwan Hwang, Jeonnam, KR;
Su Hwan Hwang, Jeonnam, KR;
Other;
Abstract
Provided is a natural dyeing method of a fiber using an indigo plant. The natural dyeing method includes dissolving a water-soluble pigment present in leaves of the indigo plant in water to mix the water containing the water-soluble pigment with lime powder and air, concentrating the resulting mixture into an insoluble pigment, mixing the concentrated indigo plant dye with caustic soda to reduce the resulting mixture into a water-soluble pigment through microbial fermentation, immersing a fiber in the soluble indigo plant dye solution to dye the fiber, and bringing the dyed fiber into contact with air to convert the soluble indigo plant dye solution into the insoluble pigment again, thereby completing natural dyeing using the indigo plant. Therefore, the natural dyeing can be performed at a very fast dyeing rate, and the fiber can show excellent color fastness. Also, the fiber cannot be easily discolored by water or detergent, and can be useful in preventing water pollution or dermatitis.