Question

Given below are two statements:
Statement I: Lock stitch is appropriate for stitching the stretch fabrics
Statement II: Lock stitch stretches along with the fabric being stitched
In light of the above statements, choose the most appropriate answer from the options given below:

• A. Both Statement I and Statement II are correct
• B. Both Statement I and Statement II are incorrect
• C. Statement I is correct but Statement II is incorrect
• D. Statement I is incorrect but Statement II is correct

Hint:

Stitch Selection:
Lock Stitch (301) $\rightarrow$ Rigid, non-extensible (Woven fabrics).
Chain/Overlock Stitch (401/504) $\rightarrow$ Extensible, loop structure (Knit/Stretch fabrics).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Sewing stitch mechanics (ISO stitch classes) differentiate rigid interlocked seams from extensible looped chain stitches.

Step 2: Detailed Explanation:
1. Statement I: The standard Lock Stitch (Class 301) uses rigid needle-and-bobbin thread interlocking. Because the interlocked threads have zero inherent elasticity, lock stitches are inappropriate for stretch knit fabrics, as the seam thread snaps under tension. (Chain stitch Class 401 or Overlock Class 504 is required). Hence, Statement I is incorrect.
2. Statement II: Lock stitch threads remain straight and interlocked; they do not possess loop reserves to stretch alongside elastic fabrics. Hence, Statement II is incorrect.

Step 3: Final Answer:
Therefore, Both Statement I and Statement II are incorrect, matching option (B).