GATE (TF) Textile 2017 Question Paper Solution | GATE/2017/TF/55

Question 55 (Textile Engineering & Fibre Science)

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
Assertion: Burnt out effect on polyester/cotton blend fabric can be obtained by printing.
Reason: Printing paste contains a reagent that releases an acid during steaming.

(A)Both [a] and [r] are true, and [r] is the correct reason for [a]
(B)Both [a] and [r] are true, but [r] is not the correct reason for [a]
(C)Both [a] and [r] are false
(D)[a] is true but [r] is false
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Frequently Asked Questions | FAQs

What is burnout effect on fabric?

Burnout is a textile finishing process that involves removing certain fibers from a fabric using a chemical process, leaving behind a semi-transparent design on the fabric. The process creates a unique, textured look on the fabric, with a combination of sheer and opaque areas.
The burnout effect is typically achieved by applying a chemical compound to the fabric, usually a mixture of sodium bisulfite and hydrogen peroxide. The compound breaks down the fibers of the fabric in certain areas, leaving behind a sheer, lightweight material in a pattern or design. The process is often used on fabrics that have a blend of fibers, such as cotton and polyester, as it will selectively break down one fiber while leaving the other intact.
The burnout effect can be used to create a variety of designs and patterns, ranging from intricate lace-like designs to bold geometric shapes. It is commonly used in fashion to add visual interest and texture to garments, such as dresses, skirts, and tops. The process can also be used on home décor fabrics, such as curtains and upholstery, to add a unique touch to a room.
One potential drawback of the burnout process is that it can weaken the fabric in the areas where the fibers have been removed, making it more prone to tearing or fraying. As a result, garments or fabrics with a burnout effect may require more delicate handling and care than other fabrics. Additionally, the process is not suitable for all types of fabrics, and can be more challenging to apply to certain materials.
Overall, the burnout effect is a popular finishing process in the textile industry, valued for its ability to create unique and visually striking designs on fabric.

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