|
KMID : 1041219980400010078
|
|
Journal of Sericultural and Entomological Science
1998 Volume.40 No. 1 p.78 ~ p.85
|
|
|
A Study on the Silk Dyeing With Natural indigo Extracted from Polygoum tinctorium
|
|
|
|
|
Abstract
|
|
|
|
Colorants were prepared by extraction of natural indigo which was harvested just in the blooming season(in the late of July). 100 g of fresh leaves soaking in 1 l water was kept at 30°C, 30 hours. A solution of 3 g/l calcium hydroxide was added into it to precipitate dye substance and it was freezing-dried into powder form. The fermentation and dyeing conditions were investigated. The results obtained are summarized as follows; K/S value of dyed silk fabrics of fermentation conditions was higher at 95°C for 20 min. than at 40°C for 20 hours. Furthermore, K/S value of dyed silk fabric was raised by the addition of 5g/l of glucose and 5g/l of NaOH. K/S value increased as extending of dyeing time when dyed till 2 hours at 30°C. K/S value decreased in order of 30°C, 40°C and 50°C, at the various dyeing temperatures and dyeing concentrations, and colour fastness ranged from 4 to 5 grade in terms of washing, perspiration and light fastiless.
|
|
|
KEYWORD
|
|
|
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|