Friday, 12 June 2009

Printing with Natural Dyes



Printing with Natural Dyes

In traditional methods in India, printing is essentially carried in three steps:

1. Preparation of the Cloth
2. Mordanting
3. Dyeing

1. First of all the cloth is prepared by applying tannin.

2. A thickened mordant is printed on this tannin treated cloth in the desired pattern.

3. The cloth is then dyed so that dyestuff attaches itself to those parts of the cloth to which mordant has been applied.

Thus the various processes are:

a. Tanning of fabric
b. printing of mordant
c. fixing of the modant
d. washing out the excess of fixing agent
e. dyeing
f. washing and soaping.

Harda or Myrobalan is used in India as a tanning agent for dyeing and printing with natural colours.

It is applied on scoured cotton fabric in cold ( 10-40 gpl) using conventional method of tub dip wherein the Harda powder is replenished with each piece added to the bath.

After drying various metallic salts such as alum or ferrous sulphate are printed on the fabric either separately or in mixtures.

It is then subsequently dyed with madder root ( Manjith), pometranate rind, kusum flowers and other vegetable dyes.

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