Kinne, Helen · New York: The Macmillan company · leaf 297
284 CLOTHING AND HEALTH … Chemical tests. Chemicals are used for identifyingfibers. Have you learned in your eighth grade studiesabout acids and alkalies ? Have you studied at allabout chemicals ? It is possible to discover the compo-sition of woven materialsby testing them with chemi-cals. This is because acidsand alkalies…
Sewing · Clothing and dress
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