Textiles Theory 1.5

• What are the different embroidery techniques mentioned?

  Different embroidery techniques
• How are quilted fabrics made?

  Through specific quilting techniques
• Why are colour and pattern important for consumers?

  They influence selection for specific uses
• How is colour created on fabrics?

  By light absorption or reflection
• What are the methods of applying colour to textile products?

  Dyeing, printing, embroidery, and trimmings
• What is textile dyeing?

  Permanent application of a colourant to fabric
• What must a colourant do to be successful in dyeing?

  Be absorbable and soluble
• What is the dye liquor in commercial dyeing?

  A mixture of dyestuff, water, and chemicals
• What is the purpose of the batch number in dyeing?

  To ensure consistent colour across products
• What are the three basic steps in the dyeing process?

  Immerse, attach dye, fix dye
• Why is the dye liquor usually heated during dyeing?

  To help the dye penetrate the fibers
• What happens if excess dye is not removed after dyeing?

  Fabric may lose colour or streak
• What is a discharge technique in dyeing?

  Removes colour using a chemical deactivator
• How does a resist technique work?

  Prevents dye uptake in certain areas
• What is tie-dye?

  A method of resist dyeing using knots
• How does batik resist dyeing work?

  Uses wax or rice paste to resist dye
• Why are commercially produced tie-dye or batik patterns often printed?

  It is costly to produce by hand
• At what stages can textiles be dyed?

  From fibre to finished article
• What is spin or dope dyeing?

  Dye added to spinning solution before spinning
• What is stock dyeing?

  Fibres dyed in loose form before spinning
• What is yarn dyeing?

  Yarns dyed before being made into fabric
• What is fabric dyeing also known as?

  Piece dyeing
• What is garment dyeing?

  Ready-made garments dyed as required
• What is dye fastness?

  Ability to retain dye during use and care
• What are the three ways colour degradation can occur?

  Fading, crocking, and bleeding
• Why must colour fastness be considered when selecting a dye?

  It forms part of the product specification
• What types of fastness might fabrics need?

  Washing, dry cleaning, light, perspiration, rubbing
• How does chlorine bleach affect fabrics?

  It removes colour from most fabrics
• How do colour forecasters help designers?

  They predict popular colours for future trends
• What is the significance of trade fairs like Premier Vision?

  They showcase colour trend predictions
• What is Just in Time (JIT) manufacture?

  Manufacturing based on current market demand
• What is the difference between printed and woven fabrics?

  Printed fabrics show design only on one side
• What is grey or greige cloth?

  Fabric not yet dyed or printed
• What is desizing in fabric preparation?

  Removing starch or gelatine from yarns
• What is scouring in fabric preparation?

  Removing fatty and waxy impurities
• How is cotton scoured?

  By boiling in caustic soda solution
• How is wool scoured?

  Using warm detergent solutions
• What is bleaching in fabric preparation?

  Obtaining an evenly white fabric before dyeing
• What is the purpose of printing techniques?

  To apply patterns onto the fabric
• What is screen printing?

  A cost-effective method for large quantities