Question 15 (Textile Engineering & Fibre Science)
A fabric is to be dyed in 4% shade on a continuous dyeing machine. The padding mangle of the machine is set at 80% expression. The concentration (g/l) of the dye in the padding bath should be
Option C is correct.
The concentration(g/l) of the dye in the padding bath=?
Let the fabric weight=100 kg
Then, dye wt=100 x 4%
Dye weight=4 kg
Wet pick up expression=dye add on x 100/Concentration
80=wt. of size part in liquor x 100/Dry wt of fabric
80=Wt. of size part in liquor x 100/100
Wt. of size part in liquor=80 kg
As we know,
Concentratio(g/l)=Dry wt. of size /Volume of liquor in litre