Textile fabrics and their preparation for dyeing : with numerous engravings and diagrams (1906)
Hummel, J. J. (John James), d. 1902, Hasluck, Paul N. (Paul Nooncree), 1854-1931, Foster, A. R · Philadelphia : David McKay · leaf 20
ld or platinum, silver tarnishes, ordiscolors, when exposed to air. Light-sensitive silversalts are, therefore, used to coatcamera film. Every time you take apicture youre tarnishing silver. A GOINGPLATINUM Durable, weighty, andglowing with a radiant luster,platinum is more valuablethan gold.… … Silver flatware is polished to remove the tarnish. MIXING METALS The Bronze Age marked an importanttechnological advance for humankind.Around 3000 B.C., it was discovered thatadding tin to copper would create a hardermetal, called bronze. Such a metal, formedwhen two or more metals are melted…
Dyes and dyeing
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