Indigo dye process
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 27, 1996
Issued Date -
N/A
app pub date -
Dec 23, 1994
filing date -
May 10, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved nonpolluting method of dyeing fibers or fabric, including natural cellulose fibers such as cotton or linen, using indigo dye. The improved process preferably includes pretreating the fibers with a mordant solution, preferably a natural nonpolluting mordant solution. The fibers are then treated with a reduced indigo liquor in an inert atmosphere, preferably nitrogen. The indigo is then oxidized by flooding the dyed fabric with water. This indigo dye process can be adapted to conventional garment, package and piece dye processes and machinery, which has not been possible with existing indigo dye processes. The improved process results in a consistent and even dyed material which is color and washfast.
First Claim
Other Claims data not available