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alloys, jewellers'


Значение термина alloys, jewellers' в knolik


alloys, jewellers' - Alloys, Jewellers'
alloys, jewellers' - The following are summarised from Fesquet:

Algiers metal: (a) 90 tin, 10 antimony; (b) 94.5 tin, 5 copper, 0.5 antimony, a is used for spoons and forks, b for small hand-bells,

Argentin: 85.5 tin, 14.5 antimony; suitable for spoons and forks.

Ashberry metal: 78 to 82 tin, 16 to 20 antimony, 2 to 3 copper.

Blue gold: 750 gold, 250 iron; prepared by dipping iron wire into molten gold, then casting, hammering, and passing through a draw-plate.

Britannia metal: (a) 9 tin, 1 antimony; (5) 85 to 90 tin, 5 to 10 antimony, 0.5 to 2 zinc, 1 to 3 copper; (o) 85 tin, 5 antimony, 5 bismuth, 1.5 zinc, 3.5 copper.

Chrysocale: 9 copper, 8 zinc, 2 lead.

Common jewellery: 3 refined copper, 1 old Bristol bronze, and 25 tin for every 100 copper, the tin being replaced by a compound of lead and antimony when a fine polish is needed.

Dipping metal: 48 copper, 15 zinc.

English metal: 88 tin, 2 pure copper, 2 brass (containing 75 copper, 25 zinc), 2 nickel, 1 bismuth, 8 antimony, 2 tungsten.

Fettdlle morte (dead leaf): 700 gold, 300 silver.

Fine gold: 750 gold, 250 silver.

Gilding metal: 4 copper, 1 brass (containing 3 copper,0.1 zinc), and 70 tin for each 80 copper.

Jewellery gold: 38.85 gold, 5.70 silver, 10.20 copper.

Mannheim gold: (a) 10 copper, 1.4 brass (containing 3 copper, 1 zinc), 0.1 tin; (b) 3 copper, 1 zinc, 0.5 tin.

Minofor: 3.25 copper, 67.50 tin, 17 antimony, 8.95 zinc.

Mock gold: (a) 16 copper, 7 platinum, 1 zinc; (b) 100 copper, 17 tin, 6 magnesia, 3.6 sal ammoniac, 1.8 quicklime, 9 bitartrate of potash; the copper is melted first, and the magnesia, ammonia, lime, and potash are successively added in small quantities; finally the tin is introduced in fragments, and the whole fused for 35 minutes.

Plate pewter: 90 tin, 7 antimony, 2 bismuth, 2 copper.

Queen's metal: (a) 3 to 9 tin, 1 antimony, 1 bismuth, 1 lead; (b) 2 copper, 50 tin, 4 antimony, 0.5 bismuth; (c) 24 brass (containing 7 copper, 3 zinc), 96 antimony, 30 tin; (d) 0.8 antimony, 18 bismuth, 32 lead.

Red gold: 750 gold, 250 copper.

Ring gold: 49.60 coin gold, 12.30 silver, 23.60 refined copper.

Tubania (Engestrum): 4 copper, 8 antimony, 1 bismuth, added to 100 tin.

Tubania (English): 12 bras (containing 7 copper, 3 zinc), 12 tin, 12 bismuth, 12 antimony.

Tubania (German): 0.4 copper, 3.2 tin, 42 antimony.

Tubania (Spanish): 24 iron and steel scraps, 48 antimony, 9 nitre; the iron and steel are heated to whiteness, and the antimony and nitre gradually added; 2 oz. of this is alloyed with 1 lb. tin; a little arsenic is an improvement.

Vert d'eau (water green): 600 gold, 400 silver.

White gold (electrum): gold whitened by addition of silver.

Yellow (antique) gold: pure gold.

Yellow dipping: 2 bronze (containing 7 copper, 2 tin, 3 zinc), 1 copper, and 10 tin for each 640 copper.

The following forms a fusible malleable metal, easily worked by a silversmith, resisting oxidation, and capable of being soldered: 720 parts copper, 125 nickel, 10 bismuth, 90 zinc, 20 soft iron, 20 tin.

Sauvage has introduced the following alloy: 58 copper, 27 zinc, 12 nickel, 2 tin, 0.5 alumina, 0.5 bismuth; the ingredients are fused separately, mixed, and the whole is run down into a homogeneous mass, which is silvery, sonorous, malleable, ductile, tenacious, polishes well, and does not tarnish.

As a silvery-looking alloy, Parker recommends 70 copper, 30 manganese, 20 to 35 zinc, or, if not needing to be subjected to high temperature, 49 copper, 21 manganese, 5 to 10 iron, 5 to 10 zinc. The solder used for it contains 7 copper, 3 manganese, 1 to 2 silver.

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