Experiment  Name: Printing of 100% cotton fabric with reactive dye.

Theory:  The printing of textile material is the application of color according to predetermined design. In direct style the dyes are directly printed at the required places of the fabric. Nowadays screen printing is by far the most common technology today. There are two types of screen printing system.

1. Rotary screen printing.
2. Flat screen printing.

Objective:
1. To learn about printing process of cotton fabric by reactive dye.
2. To learn about screen printing method.

Nature of Sample: 100% cotton woven fabric.

Apparatus required:
1. Beakers.
2. Glass Rod.
3. Measuring Cylinder.
4. Digital Balance.
5. Printing Screen.
6. Squeezer.





Process Sequence:
Preparation of fabric.
Preparation of print paste.
Application of print paste on the surface of the fabric.
Dry the fabric at room temperature.
Steaming
After Treatment.

Printing recipe :
Reactive dye : 2 parts
Urea : 5 parts
Resists salt : 2 parts
Soda ash : 1 parts
Sodium alginate : 65 parts
Water :25 parts
Total 100 parts

Working Procedure:
1. Preparation of fabric.
2.
·         Urea + Dye + Boiled water = paste-I
·         Paste-I + thickener = paste – II
·         Paste II + soda ash = print paste
3. Application of print paste on the surface of fabric.
4. Dry the sample at room temperature.
5. Steaming at 100deg C.
6. Soap wash

Sample attachment and observation:



Pre caution:
1. We have to maintain the viscosity of print paste.
2. We have to apply even pressure on squeezer for even printing.



Conclusion: >>>>>