In this article, we are going to do an experimental dyeing procedure of cotton fabric with natural Turmeric. This procedure is done practically in the chemical lab and described here as it is followed. Carefully all the procedures are done, and the final output found the fabric in yellow color.
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Theory
Natural dyes are derived from natural sources. We get turmeric dye from directly turmeric, a kind of spice that is also used for cooking. Natural dyestuff refers to the plant or other material from which this is extracted.
Objectives
- To know about natural dye.
- To know about the dyeing process of turmeric dye.
Apparatus
- Glass rod
- Pot (made of stainless steel)
- Heat source
- Weight balancer etc.
Recipe
Calculations
Sample fabric= 5 gm
So, Total liquor= (5✕20)= 100 ml
Dye,
100 gm fabric needed 2 gm of dye
So, 5 gm of fabric needed (2✕5) /100= 0.1 gm
Chemicals,
Alum= (3✕100) /1000= 0.3 gm
Wetting agent= (1✕100) /1000= 0.1 ml
Sequestering agent= (1✕100) /1000= 0.1 gm
Levelling agent= (1✕100) /1000= 0.1 ml
Salt= (2✕100) /1000= 0.2 gm
Total liquid chemicals= (0.1+0.1)= 0.2 ml
Required freshwater= (100-0.2)= 99.8 ml
Working Procedure
- Sample fabric (scoured and bleached) is weighted and taken 5 gms
- Chemicals (liquid and solid) are calculated and taken as the required amount in the dye pot.
- Freshwater is added as required.
- Fabric is dipped in the dye pot.
- Heated the pot at 80℃ for 50 minutes.
- After dyeing, rinsed the fabric and added detergent, and washed the fabric at 70℃ for 10 minutes.
- Then dried the fabric.
- Finally ironed the fabric.
- Thus dyeing is done.
Turmeric Dyed Fabric Sample
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| Turmeric Dyed Cotton Sample ©Textile Pad |
The Curve of Turmeric Dyeing
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| Turmeric Dyeing Curve ©Textile Pad |
Precautions
- Fabric must be scoured and bleached.
- Dyeing temperature and time should be maintained.
- The washing temperature should be carefully maintained.
- The recipe should be accurately followed.
Conclusion
We have dyed cotton fabric with turmeric dye, which is a natural dye. Here, the temperature is used 80°C. At higher temperatures, more than 60℃, natural dyeing could be hampered. We could use this temperature because the dyeing process is done in an open bath in the lab. But in a close bath, natural dye will be damaged at higher temperatures, more than 60℃.