VI. Very short answer type questions:
1. How can you identify a natural and synthetic
fibre?
2. What is scouring?
3. Name the three types of animal fibres.
4. Name the different categories of mineral fibres.
5. What is bioclip?
6. What is grease wool?
VII. Short answer type questions:
1. What do you understand by the term 'shearing?
When is it done?
Answers
Answer:
1. All fabrics can be characterized as either natural or synthetic fibers (or a blend of the two). Both types have pros and cons; natural fibers come from plants and animals, while synthetic fibers are made from chemical compounds, and each is valued in the textile industry for different reasons
2. The process of washing of sheared skin with hair in tanks to remove any kind of dust, dirt or grease is called scouring
3. astrakhan, liama wool, beaver
4. mineral fibers are asbestos, graphite, and glass
5. Bioclip. A system for harvesting wool, in which sheep are injected with recombinant epidermal growth factor (EGF). This causes a natural disruption of hair growth, allowing the wool to be slid, glove like, from the sheep 4 weeks after the injection.
6. Lanolin, also called wool yolk, wool wax, or wool grease, is a wax secreted by the sebaceous glands of wool-bearing animals. Lanolin used by humans comes from domestic sheep breeds that are raised specifically for their wool
vii
1. Shearing means that there is a shear strain in material. And shear strain is a deformation caused by sliding of internal surfaces parallel to each other. Often the word „shearing” is used when shear strain reaches plastic area so that it's irreversible
how can you identify a natural and synthetic fiber