Watson, Kate Heintz. [from old catalog], American school of home economics, Chicago. [from old catalog] · Chicago, American school of home economics · leaf 44
- of the fiber. The chief impurity is the wool IVOOL 41 grease or yolk which is secreted by the skin glandsto lubricate the fiber and prevent it from matting. In the scouring of wool, soap is the principal agent.Soft soap made from caustic potash is generally used ScouringAgents … ONE METHOD OF WOOL SORTING1—The Best Grade; 2—Lowest Grade; 3—Fair; 4—Medium Grade. as it is less harmful than ordinary hard soda soap.Potassium carbonate—pearl ash—is often used inconnection with the soap. If the water for scouring ishard, it is softened with pearl ash. The temperature 42 TEXTILES…
Textile industry and fabrics · Sewing · Dressmaking
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