CBSE Class 7 Answered

Processing of a Fibre into Fabric:

• Extraction of fibres either from the plant or animal source.
• A group of filament or staple fibres extracted are twisted together to form a yarn.
• These yarns are twisted tightly and allowed to rotate on the different types of rollers, weaved and knitted by passing a different number of yarns together to produce fabrics.
• These fabrics are treated with chemicals in the textile industries to make different types of clothing materials like cotton fabrics, woollen fabrics, silk fabrics, polyester fabrics etc.
• Later, these fabrics are processed for bleaching to give a smooth, shiny look, colour dying to add colours to the fabric materials, and screen printing to design the fabrics.