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IJFTR Vol.32(4) [December 2007] >


Title: Dyeing of jute and cotton fabrics using Jackfruit wood extract: Part I — Effects of mordanting and dyeing process variables on colour yield and colour fastness properties
Authors: Samanta, Ashis Kumar
Agarwal, Priti
Keywords: Cotton
Dyeing
Jackfruit wood
Jute
Mordanting
Myrobolan
Natural dyes
Issue Date: Dec-2007
Publisher: CSIR
IPC CodeD06P
Abstract: Conventionally bleached jute and cotton fabrics have been subjected to pre-mordanting with selective single and double mordants using myrobolan (harda) and other mordants (metallic salts) followed by dyeing with aqueous extract of jackfruit wood and then studied for their mechanical and dyeing properties. It is observed that the application of 10-20% myrobolan followed by 10-20% of Al₂(SO₄)₃ or FeSO₄ in sequence have been identified as two most prospective mordanting systems. The study on the effect of dyeing process variables on surface colour strength indicates that the 90 min dyeing time, 70-90ºC dyeing temperature, 11.0 pH, 1:30 material-to-liquor ratio, 20-30% mordants concentration, 30-40% dye concentration, and 15 gpl common salt are the optimum values with minor differences among the different fibre-mordant systems studied. Colour fastness to washing, rubbing and exposure to sunlight, in general, and dyeing-pH sensitivity, in particular, for selective fibre-mordants-dye systems have also been assessed and compared. Dyeing at pH 11.0 for both the double pre-mordanting systems offers overall good colour fastness properties.
Page(s): 466-476
ISSN: 0971-0426
Source:IJFTR Vol.32(4) [December 2007]

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