logging in or signing up Manufacturing process of Silk ps18 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 1294 Category: Entertainment License: All Rights Reserved Like it (1) Dislike it (0) Added: November 07, 2011 This Presentation is Public Favorites: 0 Presentation Description No description available. Comments Posting comment... By: linyue (17 month(s) ago) Hello, this is good file , Could you send it to me , my emaill is firstname.lastname@example.org Saving..... Post Reply Close Saving..... Edit Comment Close Premium member Presentation Transcript Introduction: Introduction Silk is the very fine strand of fibre that is solidified protein secretion produced by certain caterpillars to encase themselves in the form of cocoons. It is composed of a substance called bifilar containing fibroin and sericin. Silk producing countries Japan is the highest and others are India,China ,Italy,Spain,France etc.SERICULTURE: SERICULTURE It is the cultivation of cocoons for their filament.Mulberry leaves form the basic food material for silkworms. Ideal temp: 23c-27c Humidity: 65-80% All 4 stages are important Worm ,Egg,Larva,Pupa.: Silkworm Silk egg Larva PupaSilkworm Rearing : Silkworm Rearing Great care at the different stages As the larva hatches (0.4mg)and grows 10,000times its wtg in 26-28days. The worm spins the cocoon to permit development into pupa Pupa emerges as the moth Moth from the female lays egg and lifecycle continues.Silk fiber: Silk fiber Spinnrette:It is a small opening under the caterpillar jaws. Worm secretes a protein like substance through the spinnrette and is spun around it in form of figure 8 It has 2 strands of Fibroin stuck together Sericin . It solidifies on exposure to air. Intact cocoon is obtained by killing the pupa by a process called stoving.SPINNERETTE : SPINNERETTEFILATURE OPERATIONS: FILATURE OPERATIONS Cocoons transferred to the factory Unwounded silk into skeins Sorting of cocoons on the basis of colour,shape,size and texture is done. STIFLING:The pupa turns to moth and damages the cocoon so it is killed .SILK REELING: SILK REELING Process of unwinding of the silk filament from the cocoons using suitable appliances. 3-10 strands are reeled together.RE-REELING: RE-REELING Reeled silk contain defects so re-reeling is done. WHY? Rectifies defects Raw silk is reeled to standard size silkMANUFACTURING OF SILK YARNS: MANUFACTURING OF SILK YARNS Reeled silk is transformed into silk yarns-Throwing. Raw silk is soaked in warm water and then skeins are put on light reels then wound in bobbins. This thread is inspected and send for manufacturing of fabric.EVALUATION: EVALUATION Strength Elasticity Resilience Drapability Heat Conductivity Absorbency Cleanliness and washability Reaction to Bleaches ShrinkageSlide 12: Effect of heat and light Resistance to mildew Resistance to Insects Reaction to Alkalies ,acids Affinity for Dyes Resistance to perspiration You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.