Question

What is mordant ?
(A) Mordant is a dye colour that bites into fiber on which we want to apply colour
(B) Mordant is a metallic ion or salt added to the dye bath to make dyes more colorfast by forming a bridge between the dye and the fiber.
(C) Mordant is a metallic ion that attaches to fibers and causes a color emission on the fiber.
(D) Mordant is a chemical that stops the dyr process whenever it is required to check the intensity of color on fabric.

Answer 1

Hint :To answer this question, we first need to understand what is dye . A dye is a coloured material that forms a chemical bond with the substrate it is applied on. Dyes differ from pigments in that they do not bond chemically to the substrate they colour. The dye is usually applied in an aqueous solution, and a mordant may be required to improve the dye's fastness on the fibre.

Complete Step By Step Answer:
Mordant - Mordant dye is a colourant that can be bonded to a material for which it has little or no affinity without the use of a mordant, which is a chemical that mixes with the dye and the fibre. Because dichromates and chromium complexes are the most common modern mordants, the term "mordant dye" usually refers to chrome dye. With different mordants, most mordant dyes produce distinct colours. Wool, wool blends, silk, cotton, and certain modified-cellulose fibres can all be dyed with mordant dyes.
Aluminum, chromium, iron, copper, iodine, potassium, sodium, tin, and tungsten salts (typically oxides); sodium chloride; alum, tannic acid, and chrome alum are all common mordants used in dyeing and tanning. In the hematoxylin and eosin (H&E) stain, important histotechnology mordants include alum hematoxylin and Harris' hematoxylin.
After reading this information about mordant and analyzing the options given the correct option is option (B).
So the final answer is option(B) i.e. Mordant is a metallic ion or salt added to the dye bath to make dyes more colorfast by forming a bridge between the dye and the fiber.

Note :
It's critical to use a mordant to prepare your cloth for dyeing and receiving the colour from the dye in order to generate colours that are colorfast (meaning they will remain forever). The purpose of a mordant is to establish a connection between the fabric and the dye. Mordants come in a variety of forms.