Natural Dyes for Textiles by Padma Shree Vankar

Author:Padma Shree Vankar [Vankar, Padma Shree]
Language: eng
Format: epub
ISBN: 9780081018842
Publisher: Elsevier Ltd.
Published: 2017-06-12T00:00:00+00:00

4A.7.3 Dyeing

For dyeing, sonicator has been used as dye bath. Extracted dye is taken in sonicator bath and treated fabric is dipped in it for 1 h. After one hour it is dried in shade. Dye uptake by the fabric is monitored by the lowering of optical density of the dye bath solution and also by the shade of the color that appears on the fabric. The tone can be adjusted as per the requirement. Same method has been followed for conventional dyeing. Dyed fabric is dipped in 4% sodium chloride solution for one hour and then fabric is washed with tap water and dried in the shade. Aqueous extract of Terminalia arjuna give different shades of brown with different mordants as shown in Table 4A.14 (Tiwari and Vankar, 2007).

Table 4A.14

Color obtained and L*, a*, and b* values for dyed cotton fabric with terminalia

Mordant (premordanting) Color obtained L* a* b*

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