Question

Given below are two statements
Statement I: Plisse' is obtained by applying dilute sulphuric acid at selected areas.
Statement II: Acid applied areas shrink and give the crinkled look to the fabric.
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:

To remember: Plissé is produced using caustic soda (\(\text{NaOH}\)) to shrink selected areas of cotton. Acid treatments (like sulfuric acid) are used for parchmentizing cotton to make organdy.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Plissé is a textured cotton fabric characterized by a permanently puckered or crinkled surface.
This structural design is achieved through localized chemical finishing treatments rather than mechanical weaving.

Step 2: Detailed Explanation:
Let us analyze the chemical mechanism used to produce plissé fabric:
- Statement I: Plissé is produced by printing or applying a concentrated solution of Sodium Hydroxide (caustic soda)—not dilute sulfuric acid—to selected stripes or designs on cotton fabric.
Sulfur acid is used in parchmentization to produce stiff, translucent organdy, making this statement incorrect.
Therefore, Statement I is incorrect.
- Statement II: When the fabric is treated, the areas exposed to the sodium hydroxide undergo mercerization, causing the cotton fibers to swell and shrink.
The untreated areas do not shrink, which forces them to pucker and crinkle outward, creating the characteristic puckered texture.
Because sodium hydroxide is used instead of acid, the reference to "acid applied areas" is incorrect.
Therefore, Statement II is also incorrect.

Step 3: Final Answer:
Both Statement I and Statement II are incorrect.