Bangalore
Printing With Direct Dye
Master the art of printing with direct dye. Learn step-by-step techniques, essential tips, and how to get vibrant, lasting colors on cotton fabrics.
SohaniSharma
Soda ash (Na2CO3): It maintains a suitable pH for direct dyeing.
Glycerin: It acts as a dispersing agent. It increases the brightness of the dye and spreads the dye evenly in the paste. Assist the dye fixation and prevent aggregation of the dye.
Thickener: Using CMC for thickener gives the required viscosity to the printing paste. It prevents premature reactions between the chemicals contained in the print paste and holds the ingredients of the print paste on the fabric.
Theory
By the term textile printing, we mean the localized application of dyes, pigments, or chemicals by any method, which can produce a particular effect of color on the fabric according to the design. In this experiment, we print cotton fabric with direct dye in the block. It is used mostly in sarees, handkerchiefs, etc. In printing, the coloring matter used can be either dyestuffs or pigments. The binder is decisively responsible for the fastness of the pigment prints during use. Among dyestuffs, the most important auxiliaries are the thickening agents. The use of printing thickener depends on the printing technique, fabric, and dyestuff.
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Objectives
- To print cotton by using a block.
- Learn about the printing process.
- To know about the printing auxiliaries.
- To know about the recipe.
Recipe
Procedure Flow Chart
Printing
↓
Drying
↓
Steaming
↓
Soaping
↓
Washing
Working Procedure
1. First, prepare a thickener.
2. Then take the required amount of dyestuff in a bath.
3. Then add the required amount of chemical auxiliaries and thickener.
4. Then continuous stirring is done few minutes for mixing and prepared print paste.
5. Then select a block and take a fabric.
6. The block is touched with print paste and pressed upon the fabric.
7. After pressing, the block is put off from the fabric.
8. Then dried, steamed for absorbing dyestuff, and swamped for reducing unfixed dye.
9. Then wash it.
10. Finally, the printed fabric is ready.
Sample of Printed Fabric
 |
| Direct Dye Printed Fabric |
Auxiliary Chemical Functions
Direct dye: Direct dyes are molecules that adhere to the fabric molecules without help from other chemicals. It is the primary chemical substance to color the fabric, and it is an anionic dye.
Soda ash (Na2CO3): It maintains a suitable pH for direct dyeing.
Glycerin: It acts as a dispersing agent. It increases the brightness of the dye and spreads the dye evenly in the paste. Assist the dye fixation and prevent aggregation of the dye.
Thickener: Using CMC for thickener gives the required viscosity to the printing paste. It prevents premature reactions between the chemicals contained in the print paste and holds the ingredients of the print paste on the fabric.
Conclusion
Through this experiment, we have acquired knowledge about the process of printing cotton fibers with direct dye. The shade of printed fabric is moderately good as required.
Ahmedabad
