METHOD OF PREPARING BROWNING ALLOY FOR DECORATIVE TREATMENT OF SURFACES OF ARTICLES

摘要

alloy technology. SUBSTANCE: each metal - silver, copper, and lead - is sulfided at 450-550 C for 3.5-4.5 h. Sulfides obtained this way are combined and resulting charge is melted at 900-1000 C for 3.5-4 h, while receiving additional sulfur every one hour. EFFECT: improved efficiency of alloy. 4 cl, 3 tbl