Question

The general composition of printing paste has ..........

• A. Dyestuff
• B. Thickener
• C. Hygroscopic Agent
• D. Auxiliary Chemical

Hint:

Printing paste = Dyestuff + Thickener + Moisture regulator (urea) + Auxiliaries = Sharp, even, fast prints.

Answer 1

The Correct Option is C

Step 1: What is printing paste?
Printing paste is a semi-solid medium that carries dyes/pigments and other auxiliaries used in textile printing. It ensures the controlled transfer of color onto the fabric surface in desired patterns.
Step 2: Components of printing paste.
- Dyestuff (A): Provides the actual color.
- Thickener (B): Controls viscosity and prevents spreading of dye. Common thickeners include starch, alginates, gums.
- Hygroscopic agent (C): Ensures proper moisture content during steaming/fixation. Example: Urea.
- Auxiliary chemical (D): Includes oxidizing agents, crosslinkers, binders, dispersing agents depending on dye class.
Step 3: Importance of all four.
Without dyestuff there is no color, without thickener printing loses sharpness, without hygroscopic agents fixation is uneven, and without auxiliaries dye performance may be poor. Hence all four are essential.
Step 4: Conclusion.
Thus, the correct composition of printing paste contains A, B, C and D.