The ideal pH to get efficient wash down property of Indigo dyed yarn is

Which one of the following is not 'True' regarding light fastness of textile substrates ? 

Which one of the following statements is incorrect about disperse dye ?

Mercerization of cotton does not result in

Flip-flop mechanism is associated with ...........finish.

A formulator adds 200ml of water to 1000 ml of silicon emulsion whose solid content is 45%. The % solid content of the diluted silicone emlsion is