GATE (TF) Textile 2017 Question Paper Solution | GATE/2017/TF/54

Question 54 (Textile Engineering & Fibre Science)

The add-on of a chemical finish required on a fabric is 3% on-weight-of-fabric (owf). If the wet pick up is 80%, then the concentration of finish required in the padding bath, in % (wt/wt), accurate to two decimal places is __3.50 to 4.00__.

Answer / Solution

Given in the question

Add on the fabric=3%

Wet pick up=80%

The concentration of finish(wt/wt)=?

Let, weight of the fabric=100 kg


Weight of chemical finish=Weight of fabric x add on%/100

Weight of chemical finish=100 x 3/100

Weight of chemical finish(oven dry wt of finish)=3 kg

By formula –

Wet pick up%=wt of dye on liquor*100/wt of fabric

80=wt of finish on liquor *100/100

Wt of finish on liquor=80 kg

By formula-

Concentration%=Oven dry wt of finsh*100/Wt of finish on liquor



Concentration%(wt/wt)=3.7 (Answer)

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