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NATURAL DYES
Daruhaldar

tussah cocoons

GENERAL INFORMATION
In the long forgotten past natural dyes were used instead of chemical dyes .Chemical dyes were discovered about a hundred years back, but were fully accepted about 60 years back by the craftsmen.
a indigo vat being checked before dyeing

a huge alizarin dye bath being emptied

The process of natural dyes is much more complicated and laborious as compared to chemical dyes. Earlier natural resources were easily accessible to the dyers from nearby localities, but today it is very difficult to find certain dyes. Some of the plants are so few that it is illegal to cut them for example AL.
There are many natural resources available in nature which can provide colour. These are minerals, animals, lichens and plants. Presently the most common sources used for dyeing fabrics are plant sources; while for painting mostly mineral sources are used. In antiquity quite a few animal sources were used for obtaining colours- Tyrian purple, cochineal red, Saint Johns blood, etc. Cochineal and lac are the only two sources which are still in use in sizeable proportion. Lichens have been used since time immemorial in various parts of the world especially in highlands, as availability is better there. Lichens are a symbiosis of algae and fungus thread .Collection and regular availability might be difficult to commercialize the same, but colours of good strength can be derived from this source .A big range of reds, yellows, purples and browns etc ,can achieved from lichens around the world. There are various mordents like alum, ferrous sulphate, potassium dichromate, copper sulphate .In earlier times alum and iron were most popular, alum was used in its crude form in many places, iron till today is used in the form of rusted nails etc. The reason obviously must be easily availability .There are certain dyes which don’t require any mordent .The mordents not only improve fastness they also provide options in terms of colour, shade and hue. Each mordent has its own peculiarities –iron makes the colour of the fabric dark, as is commonly said a gives “a sad hue” to the colour, while chrome makes it bright.
PROCESS
Pre processing of fabric is quite laborious when dyeing with natural resources. Cotton needs extensive pre processing while silk can just be soaked, in hot water for about 5-6 hours .
white fabric lengths folded for dyeing

Cotton was traditionally soaked in oils, soaps, etc for days, this was followed by extensive beating and washing to soften the fabric and make dye absorption easy.
In case of cotton the fabric is dyed with Myrobalan before dyeing. Myrobalan is a rich source of tannin. For dyeing with silk Myrobalan treatment is not required.
myrobalan fruit

Mordanting is application of a mordant a salt which helps in fixing the dye on the fabric like alum, iron, copper, etc.
Alum should be used as a pre mordant, while iron is best as a post mordant.
Mordanting should be ideally done for about half an hour, and than the fabric should be dried without washing.
Dyeing can be ideally done for half an hour, when working with soft dye materials like flowers or fruit rinds etc. While it might take 2-4 hours for something like lac to get a good deep colour.
lac being crushed before being soaked for dyeing

Most of the natural dyes can be dyed using a direct method, that’s boil the dye material add the fabric, move it constantly and than wash the same.

Certain dyes like indigo and Al have a more complicated process.
indigo powder

indigo Vat

After dyeing the fabric needs to be washed thoroughly to remove all excess colours.
The soft dye materials like flowers, petals should be soaked for at least 5-10 hours to get the best results. While the hard materials like barks or roots should be soaked for at least 2-3 days to get a good colour.
marigold flowers in the courtyard

AUTHOR
KAMALDEEP KAUR
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