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WEEK 5.
TOPIC: PREPARATION OF DYE BATH
- Preparation of dye bath.
- Dyeing process
PREPARATION OF DYE BATH.
This involves setting up objects which can be used for dyeing process. The dye bath here refers to a pit filled with dye substance or a big bowl for dyeing. The dye pit is prepared when the necessary mixtures are in the dye bath e.g dye, water, caustic soda, hydro-sulphite, salt.
DYING PROCESS.
- The fabric to be dyed must be clean; you do this by washing the fabric with water.
- Plan your design by tying cloth in any combination.
- Prepare your dye bath.
- Dip cloth in dye solution and stir constantly with stick so that the material will be dyed evenly or using hand /rubber gloves to protect your hand.
- Leave the material in dye bath for about 40 minutes.
- Remove from dye and Hang for oxidation for 10 minutes.
- Rinse in cold water
If another colour is to be used, untied the strings desired, re-tie at other sports and put in another colour of dye solution. Start with …………….
The two chemicals used with the dye stuff are:
- Sulphuric acid and chlorine
- Turpentine and glaze
- Caustic soda and sodium sulphite
- Sodium hydrosulphite and fixative
Why is it necessary to put on rubber gloves during dyeing exercise?
- To prevent the damaging actions of the chemicals on the skin
- To make the turning of the cloth easier
- To make the cloth absorb easier
- To make dye solution cover the materials well
Dye stuff are:
- Mixture of some chemicals
- Substances obtained from some plants and processed into several colour
- Products of some fruits juice
- Combination of water colour and oil colour
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