alloys, specular



alloys, specular defined in 1909 year

alloys, specular - Alloys, Specular;
alloys, specular - These are employed for making metallic reflectors, requiring a true white colour, good lustre, and a hard, clean surface not easily tarnished or scratched. Fesquet gives a number of combinations, as follows:

(a) 62 parts copper, 32 tin, 6 lead; (b) 80 copper, 10 lead, 10 antimony; (c) 66 to 63 copper, 33 to 27 tin; (d) 10 copper, 10 tin, 10 antimony, 50 lead; (e) 32 copper, 50 tin, 1 silver, 1 arsenic; (f) 90 steel, 10 nickel; (g) 50 palladium, 50 silver; (h) 60 platinum, 40 copper; (i) 50 platinum, 50 steel; (j) 50 platinum, 50 iron; (k) 10 platinum, 90 steel; (l) 20 platinum, 80 copper, 0.5 to 1 arsenic; (m) 60 platinum, 30 iron, 10 gold; (n) 50 gold, 50 zinc; (o) 50 steel, 50 rhodium; (p) 10 platinum, 90 iridium;(q) 29 tin, 19 lead; (r) 52 copper, 30 nickel, 12 zinc, 5 lead, 1 bismuth; (s) Equal parts of tin and copper form a white metal as hard as steel; (t) Less tin and a small quantity of arsenic added to the alloy forms a white hard metal of high lustre; (u) 2 lb. copper, 1 lb. tin, 1 oz. Arsenic form a good speculum metal; (v) An alloy of 32 copper, 16.5 tin, 4 brass, 1.25 arsenic, is hard, white, and of brilliant lustre.

near alloys, specular in Knolik


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