This document provides information about silk in 3 sections. It first discusses that silk is a natural protein fiber produced by insect larvae to form cocoons, composed mainly of fibroin. It then reviews the history of silk originating in China and spreading to other countries. Finally, it outlines the 5 step production process of silk including raising silkworms, extracting threads from cocoons, dyeing, spinning into yarn. It also lists properties and uses of silk.

1. Welcome to My Presentation

2. Mahedi Hasan Raju
ID : 201003012

3. SILK

4. ABOUT SILK
 Silk is a natural protein fibre. The protein fibre of
silk is composed mainly of fibroin and is produced
by certain insect larvae to form cocoons.The protein
fibre of silk is composed mainly of fibroin and is
produced by certain insect larvae to form cocoons.

5.  HISTORY OF SILK
•The production of silk originates in China in the
Neolithic. Silk remained confined to China until the half
of the 1st millennium BC. China maintained its virtual
monopoly over silk production for another thousand
years. Silk cultivation spread to Japan around 300 AD,
and, by 522 AD.

6.  PRODUCTION PROCESS OF SILK
• Step 1: Raising silkworms & harvesting
cocoons.
• Step 2: Thread extraction:
• Step 3: Dyeing.
• Step 4: Spinning.
• Step 5: yarn.

7.  PROPERTIES OF SILK
•low density makes for light and comfortable clothing.
•high resistance to deformation.
•good insulation properties / warm in winter, cool in summer.
•strongest natural fiber available.
•shimmers and shines.
•good affinity to dye.
•leaving aside the rather demanding care, silk is one of the most comfortable
fiber fabrics in the world.

8.  SILK ADVANTAGES & DISADVANTAGES
Advantage Disadvantage
Soft Expensive
Drapes well Needs special care, dry cleaning
Dyes and prints well Stains with water
Very strong Yellows with age
Lightweight Weakened by perspiration, sun, soap
Resists soil, mildew, and moths Attacked by insects, silverfish
Comfortable
Absorbent

9.  USE OF SILK

10.  BANGLADESH SILK
•Rajshahi silk:Rajshahi silk is the name given to the silk
products produced in Rajshahi, Bangladesh. It is famous
because it is a high quality fabric used for clothing, especially
for saris.

11. THANK YOU