CHAPTER 5 - SILK
Silk - Answer- - Is a natural protein fiber
- China around 2640 B.C.
- Production closely guarded secret for centuries
- Currently no successful silk production in US
- China
- India
- Japan
Sericulture - Answer- - Production of silk
- Silk moths lay eggs
- Eggs ha...
CHAPTER 5 - SILK
Silk - Answer- - Is a natural protein fiber
- China around 2640 B.C.
- Production closely guarded secret for centuries
- Currently no successful silk production in US
- China
- India
- Japan
Sericulture - Answer- - Production of silk
- Silk moths lay eggs
- Eggs hatch and the larvae are fed mulberry leaves
- After about 35 days, the silkworms spin their cocoons
- Silkworm forces liquid silk through two spinnerets and the fiber hardens with air
contact
- One silkworm can yield up to 1 mile of single filament
- Silkworm smothered before can come out of cocoon to prevent fiber breakage
Silk noils - Answer- less expensive, less durable, lower quality
Wild silk - Answer- - Production is not controlled
- Moths eat different types of leaves: oak, cherry
- This produces a much wider variety of color and texture
Tussah silk - Answer- - The most common type of wild silk
- Coarser, darker, and cannot be bleached
- Sometimes incorrectly referred to as "raw silk"
Duppioni silk - Answer- - Results when two silkworms spin their cocoons together
- Yarn is irregular in diameter -- thick and thin
- Used often in shantung
Silk Characteristics - Answer- - Silk fibers are fine
- Wild silks are coarser
- Natural luster
- One of strongest natural fibers
- Grades of silk fabric
- Evenness, fiber size, defects
- Physical structure:
- Only natural filament fiber
- Very fine filament, irregular diameter, and triangular cross-section
Properties - Answer- - Aesthetic - Soft luster, excellent drape, excellent dyeability,
standard for many synthetic fibers
- Durability - Strong fiber but weaker when wet
- Comfort - Absorbent, good heat retention, dry hand, poor conductor of electricity
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