This deals with the bleaching and its agents used for silk fabric.

1. BLEACHING & ITS AGENTS
PRESENTED BY
DEEPA KRISHNAMOORTHI
III BSC SERICULTURE

2. BLEACHING
• Bleach - generic name for any chemical product
used industrially and domestically to whiten clothes.
• Process of whitening fibres or fabrics or depriving a coloured
material.
• By using various bleaching-agents.

4. BLEACHING
AIM – Is to transfer of coloured substances into uncoloured
substances.
EFFECTS
 Degree of whiteness – High & stable
 Enough for intend use
 Fabric – no damage
 Absorptive capacity – High & Uniform.

6. OBJECTIVES
 Removal of coloured impurities
 Minimum tendering of fibre
 Technically reliable
 Simple mode of operation
 Low energy consumption
 Increase the degree of whiteness.

7. BLEACH GOODS
• When cloth has been bleached for finishing ,it is called as
BLEACH GOODS.

9. TYPES
OXIDATIVE BLEACHING
Chemical reagent
Decompose (Alkali solution )
Active Oxygen
Intrinsic bleaching agent – Destroy colouring matter
Partially / completely.

10. CONTD.,
REDUCTIVE BLEACHING
Colouring matter
Reducing agent
Colourless material
Re oxidization – Colour may be stored in the material

11. BLEACHING AGENT
 compounds used to remove colour from substances (Textiles).
 An agent that makes things white or colourless.
OTHER NAMES
 Blanching agent,
 whitener,
 Bleach.

13. THANK YOU