Determination of Fiber Blend Composition of Wool-Cotton

• Wool
• Silk
• Mohair
• Cashmer   

• Cotton,
• Nylon (Polymide)
• Polyester
• Polypropylene
• Chloro Fibres 
• Glass

• Drying Oven – For drying Sample (105 ± 3°C )
• Desiccator
• Analytical Balance – Capable of weighing an accuracy of 0.0002 g
• Conical Flask – 250 ml
• Sieve

Reagent

• 5 % Sodium Hydroxide (Naoh) or 5 % Potassium Hydroxide (KOH)
• 5 % Acetic Acid (m/m) 

• Sample weighing about 2.0 to 3.0 g. Cut the yarn into pieces and dissect the cloth into yarn pieces of about 10 mm length.
• Dry the sample in oven at 105 ± 3°C for 30 min.
• Cool in a Desiccator and weight them 1 gm sample (W)
• To the sample contained in the conical flask, add 100 ml of 5 % Naoh or 5 % KOH solution.
• Boil for 10 minutes
• After cool the solution, filter the content of the flask through a sieve
• wash the residue on the filter sieve with hot water, dilute Acetic (5 %) solution and finally cold distilled water.
• Dry the residue in the drying oven at 105 ± 3°C to constant weight,
• Cool in a desiccator and weight them (W1)

Calculation