Dyeing and Bleaching Year 11 2nd CAT

What is bolting/clamping in tie-dyeing?

• A method of sewing fabrics before dyeing

• A method of folding fabrics and placing them between two flat woods before dyeing

• A way to heat fabrics before dyeing

• A technique used only for silk fabrics

What is the purpose of the flat wood or iron in the bolting method?

• To add weight to the fabric

• To resist the dye and create patterns

• To stretch the fabric

• To soften the fabric before dyeing

Which of the following is NOT a material needed for bolting/clamping?

• 100% cotton fabric

• Dyestuff

• Sewing machine

• Twine or raffia

What is the function of caustic soda in the dyeing process?

• It fixes the dye to the fabric

• It removes excess dye

• It makes the fabric softer

• It removes fabric stains

What is used to secure the pleats in the bolting/clamping technique?

• Needle and thread

• Glue

• Flat wood or iron

• Paintbrush

Why should the lighter color be applied first in dyeing?

• To avoid color contamination

• To prevent the fabric from tearing

• To increase the fabric's weight

• To make the fabric more flexible

How long should the dyed fabric be allowed to oxidize?

• 1-2 minutes

• 5-7 minutes

• 10-15 minutes

• 30-45 minutes

What should be done after dyeing and oxidizing the fabric?

• Package immediately

• Rinse, starch, spread to dry, and iron

• Freeze the fabric

• Remove the color using chemicals

What is the last step in the bolting/clamping process?

• Boiling the fabric

• Packaging the fabric in a neat wrapper

• Adding more dye

• Cutting the fabric into shapes

In the twisting technique, what is the first step?

• Tie knots into the fabric

• Dye the fabric immediately

• Heat the fabric before twisting

• Soak the fabric overnight