A2 Section C - Fabric Manufacture

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What is desizing?
Size (starchy substance) applied to warp yarns before they are woven to strengthen them. Most are soluble in water so can be removed.
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What is scouring?
Removes fatty & waxy impurities that would stop the fabric getting wet. Washed in solvents. Not suitable for wool.
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What is bleaching?
Removing unwanted colour using bleach before dyeing.
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Give 3 types of dye.
Direct, Reactive, Vat, Disperse, Acid
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Which fibres can direct dyes be used for?
Cellulosic, inc. cotton
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Which fibres can reactive dyes be used for?
Cellulosic, protein, nylon
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Which fibres can vat dyes be used for?
Cellulosic
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Which fibres can disperse dyes be used for?
Acetate, polyamide, acrylic, polyester
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Which fibres can acid dyes be used for?
Protein, polyamide
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What are solvent dyes?
Recently developed, applied to fabrics using solvents instead of water. Expensive equipment and recovery so it can be used again
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What issues need to be considered when dyeing a fabric?
Colour requirements, fastness requirements, cost
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Why might poorer quality dyes be used?
Only ones that produce that shade
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What are the 3 processes of dyeing a fabric?
Immersing fabric,dye attaching itself, fixing the dye to the fibre
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Give 4 reasons a fabric may need colour fastness.
Bleaching, dry cleaning, washing, light, perspiration, gas fumes, rubbing
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Name 3 different types of dyeing fabric.
Dope dyeing, stock dyeing, yarn dyeing, piece dyeing, garment dyeing
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What is dope dyeing?
Dye added to the spinning solution of man-made fibres before spinning. Good light and wash fastness.
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What is stock dyeing?
Fibres dyed in loose form. Cheap. Any uneven dyeing removed in blending process
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What is yarn dyeing?
Yarns dyed before made into a fabric
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What is piece dyeing?
woven or knitted fabrics dyed as fabric pieces
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What is garment dyeing?
Made up garments dyed. Allows colour to be added at last minute to meet trends
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Other cards in this set

Card 2

Front

What is scouring?

Back

Removes fatty & waxy impurities that would stop the fabric getting wet. Washed in solvents. Not suitable for wool.

Card 3

Front

What is bleaching?

Back

Preview of the front of card 3

Card 4

Front

Give 3 types of dye.

Back

Preview of the front of card 4

Card 5

Front

Which fibres can direct dyes be used for?

Back

Preview of the front of card 5
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