Determination of the cotton fibre by caustic soda swelling method

Introduction: FIbre maturity of cotton is a fibre character which express the relation degree of thicking of the fibre was another words, it is the measure of the prickness mary and secondary thickudiral seness.

Normal fibre:matured fibres with a well developed cell  wall and after swelling it appear red like from raw state and it also show no continuous liner in longitudinal section of matured fiber.

Dead fibre: Dead fibre are those that after swelling it has a continuous lumer and the wall thickness is a fifth or less than robbin with.

Thin walled fibre: This walled fibre are those that are not classed as normal or dead being of intermediate appearance and thickening.

Object:

• To know the maturaty of cotton fibre
• To control the quality of yarn for better production
• To mointain the buyer requirement

Working principle: To find out the mature or normal fibre half mature or thin fibre and immature or dead fibre  by uaing causting sata treatment.

Apparatus:

1. Slide
2. Microscope
3. combsorter
4. cotton fibre

working procedure:

It is most commonly used method. A thin tuft of fibre is drawn by means of tweezer from a sliver help in a comb sorter. The tuft is laid on a mleroscope and a cover slip put over the middle of the tuft. Like wise tour or eight slides are prepaned.

There are two step involed in this method

treatment with 18% coustic soda

Examination under a microscope to count the mature, half mature and immature fibre.

The fibre on the microscope slide are then saturated with small amount of 18% coustic soda solution which is swelling them.

The slide is then placed on stage of microscope and examined.