Ans. Reeling is also done in special machines. Then the sericin or silk gum holding the cocoon's filaments together is softened by alternating hot and cold immersions. cause of the damaged leaves of mulberry trees growing in their garden. Question: Write a caption for each of the figures given as figure (a-d). sorted. (d) the process of taking silk threads from cocoon. (b) The covering of silk fibres inside which the caterpillar covers itself is called cocoon. When the cocoons are exposed to the sun or steam or boiled, the silk fib gets separated. The Cocoon Food Silk Download Class 7 Science Fibre to Fabric Chapter Notes, NCERT study material for Science, Class 7 Science Fibre to Fabric Chapter Notese. This process of getting silk threads from the cocoons to use it as a silk fabric is known as reeling of the silk. There are many more useful educational material which the students can download in pdf format and use them for studies. According to an old Chinese The cocoons are kept under Accidentally a cocoon dropped into her These cocoons are kept under the sun or boiled or exposed to steam. Today the silk industry is worth a lot of money. Silk Manufacturing Process Silk is a natural protein fiber produced by certain caterpillars in orderto encase themselves in the form of cocoons. They include: •  When the silk worm forms a covering around itself by secreting a protein through its head, this is called the cocoon stage. For obtaining silk, months are reared and their cocoons are collected to get silk thread. •  Once the cocoons reach the filature operations they are sorted by color, size, shape and texture. Sericulture means ‘silk farming’. trays to which cocoons get attached. The process by which silk thread is separated from … of Burrs - The small fluffy fibres, called burrs, are picked She also noticed that they This process of selecting parents for obtaining special characters in their offspring, such as soft under hair in ... common silk moth is the mulberry silk moth. using shearing machine. All contents provided by us are based on best of our knowledge. The larva begins molting when the head turns darker and may molt about four times after which the body turns sli… Silk manufacturing process 1. The long silk fibre is obtained by unwinding the threads from cocoon .The process of taking out silk fibre from the cocoon for use is called reeling . The process of taking out threads from the cocoon for use as silk is called _____ the silk. The Reeling of silk is (a) a process of making silk reels. the silk. The resulting fibre is known as raw silk, which can be dyed into various colours. The sheared skin with hair is thoroughly washed in tanks to remove grease, dust A female silk moth lays hundreds of eggs at - The small fluffy fibres, called burrs, are picked Earthworm Cocoonv Nor we take the responsibility of the accuracy of information provided by us. silkworm farmers. The cocoons are kept under the sun or boiled or exposed to steam. Question: Explain the process to obtain silk thread from cocoon. Reeling is done in special machines, which unwind the threads or fibres of silk from the cocoon. Cocoon Inside Cocoon empress found white worms eating up mulberry leaves. sorted. This silk must then be reeled into skeens and packed into small bundles called books. These are then shipped to silk mills around the world. Small racks or twigs may be provided in the The farmers keep eggs under hygienic Butterfly or Moth Cocoon Step1: Separation of the silk fibre from the cocoon. a time. a time. the sun or boiled or exposed to steam. Reeling of the silk is carried out by special machines. The silk fibres separate out from cocoon and further it goes for the reeling process for getting silk fibres. The rearing of silkworms for obtaining silk is called 6. were spinning shiny cocoons around them. conditions and under suitable conditions of temperature and humidity. The silk fibre from the cocoon of this moth is soft, lustrous and elastic ... explain why? iv. The rearing of silkworms for obtaining silk is called sericulture. The caterpillar or silkworm spins the The cocoon are kept under the sun, boiled water or exposed to steam. eating and move to a tiny chamber of bamboo in the tray to spin cocoons. The larvae are kept in clean Explain various steps involved in the process of making Hammock Shaped Cocoon Explain the process of obtaining silk from cocoon. The process of taking out threads from the cocoon for use as silk is called reeling the silk. Silkworms spin cocoons. Step 2: Harvesting cocoons. हिंदी - बाल महाभारत कथा (Chapter 01 - 20), हिंदी - बाल महाभारत कथा (Chapter 21 - 40), NCERT Solutions for Class 7 Science PDF free download, NCERT Solutions for Class 7 Science Chapter 3 Fibre to Fabric, to Study online or download free in PDF form. Explain various steps involved in the process of making wool? Types of Insects in Cocoon We do not take the responsibility of how the information provided by this website is used or the consequence of its use. Step3: Bee Cocoons Making of Cocoons Starting with silk worms, which aren't actually worms, and ending with luscious fabric, the photos illustrate the proceedure in 6 steps. It is at this time that the cocoons are delivered to the factory by the farmer. After 25 to 30 days, the caterpillars stop - The process of taking out threads from the cocoons for use as silk is called reeling the silk. 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