Question

In warp knitting, the lapping movement having only under-lap is

• A. Closed lap
• B. Open lap
• C. Laying-in
• D. Miss-lapping

Hint:

In knitting theory, always separate the concepts of \textbf{over-lap} (loop formation) and \textbf{under-lap} (yarn shogging). If a technique avoids loop formation and uses only yarn placement, it usually falls under “laying-in.”

Answer 1

The Correct Option is C

In warp knitting, lapping refers to the movement of the yarn guide relative to the needle. The lapping is composed of two elements: over-lap (the part that forms the loop around the needle) and under-lap (the yarn movement behind the needle).
Step 1: Understand each option - (A) Closed lap: Involves both over-lap and under-lap, producing closed loops. Hence, it is not limited to only under-lap.
- (B) Open lap: Similar to closed lap but the loop structure remains open. Again, both over-lap and under-lap are present.
- (C) Laying-in: This is a special case where yarns are not looped but only laid into the fabric. Here, the yarn does not form an over-lap; it only makes an under-lap movement. Thus, this matches the condition of “having only under-lap.”
- (D) Miss-lapping: Refers to skipping needles or missing laps, not specifically about under-lap only.
Step 2: Logical conclusion Since only option (C) Laying-in corresponds to a lapping movement consisting exclusively of under-lap without forming over-lap, it is the correct answer.
Final Answer: (C) Laying-in