Why is blue applied to white clothes? Present four steps of applying blue to the clothes.

Blue is applied to white clothes because-

It acts as a fabric whitener/brightener

Four steps of applying blue to the clothes-

1.Add blue to water and dissolve well 

2.Wet the article to be blued in water and squeezed properly 

3.The article is opened and then dipped in the above blue solution

4.The article is squeezed and put in the sun

OR

Starch is applied to clothes because-

It gives crispness/stiffness/brightness to the fabric

Four steps of applying starch to the clothes-

1.Mix starch paste in water and dissolve well

2.Wet the article to be starched in water, squeeze it properly 

3.Open the article and dip in starch solution 

4.Squeeze and spread in the sun