Question

The following are types of mechanical finish applied on wool:
A. Crabbing
B. Calendaring
C. Fulling
D. Carbonising
E. Moth proofing
Choose the correct answer from the options given below:

• A. \( \text{A, B, D and E Only} \)
• B. \( \text{A, C and D Only} \)
• C. \( \text{A and C Only} \)
• D. \( \text{C Only} \)

Hint:

Mechanical = Machinery/Physical action. Chemical = Liquid chemicals/Chemical reactions.

Answer 1

The Correct Option is C

Concept: Textile finishes are categorized into Mechanical (Physical) finishes, which use heat, pressure, or moisture, and Chemical finishes, which involve chemical reactions.

Step 1: Identify mechanical finishes for wool.

• Crabbing (A): A mechanical process where wool fabric is treated with hot and cold water under tension to set the weave and prevent shrinkage.
• Fulling (C): A mechanical process involving moisture, heat, and friction to thicken and shrink wool fabric, making it more compact.

Step 2: Filter out chemical and general finishes.

• Carbonising (D): A chemical process using acid to remove vegetable matter from wool.
• Moth proofing (E): A chemical treatment.
• Calendaring (B): While mechanical, it is a general finish for smoothing fabrics, but Crabbing and Fulling are the specific, essential mechanical finishes for wool processing.