GATE (TF) Textile 2018 Question Paper Solution | GATE/2018/TF/38

Question 38 (Textile Technology & Fibre Science)

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r].
[a]: Emulsion thickener is used in pigment printing of textiles.
[r]: Emulsion thickener has high solid content.

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

What is the role of thickener in pigment printing?

The role of a thickener in pigment printing is to increase the viscosity or thickness of the printing paste, allowing it to be printed onto the fabric without spreading or bleeding. Pigment printing involves applying a paste made of pigment, binder, and other additives to the surface of the fabric, creating a design or pattern.
The thickener is added to the printing paste to give it a more viscous consistency, which helps to prevent the pigment from spreading too much when it is applied to the fabric. Without a thickener, the pigment may not be able to form a sharp and well-defined pattern on the fabric, resulting in a blurry or undefined print.
The thickener also helps to hold the pigment in place on the fabric during the drying and curing process, ensuring that the color remains vibrant and does not fade or bleed. Additionally, the thickener can help to improve the color fastness of the printed fabric by preventing the pigment from washing out or rubbing off easily.
Overall, the thickener plays a crucial role in pigment printing by helping to create a well-defined and vibrant print on the fabric, while also improving the color fastness and durability of the printed material.

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