Nature of wool :
- It has elastic and hygroscopic.
- It is non-inflammable and durable
- Naturally water proof
- Bad conductor of Heat and electricity
- Retain warmth and create heat
- It is devoid of medulla and skin cells
- Fine enough to make soft fiber yarn.
Factor affecting nature of wool
- Genetic factor
- Physiological and environmental factor
- Nutritional state
- Hormones (pituitary , thyroid , growth hormone , Adeno cortico-tropic hormone)
- Parasites and diseases
- Sunlight and photoperiod
- Season and climate
- Exogenous chemical like CPA
- Interval between shearing (Shearing is done generally twice in a year i.e. feb/ March and Sept/ oct.)