Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Sterling Silver Wire: 925 Silver to 75 Copper, Cast and Drawn
Sterling silver is 925 parts silver to 75 parts copper. Fine silver alone is generally too soft for working objects, so it is alloyed with copper for strength (Wikipedia, Sterling silver). Melted together, cast in a bar and drawn down through a drawplate, it becomes wire.
The picture: a silversmith drawing silver wire for jewellery, Trinidad, 1930s.
Hejuru
A day
Amabwiriza
1
1
Weigh
Weigh
Weigh fine silver and copper in the ratio 925 to 75 (see the notebook).
Ibikoresho by'iyi ntambwe:
Ifeza itunganyije92.5 g
Ikibumbe cy'umuringa7.5 gIbikoresho bikenewe:
Umunzani w'ibiro2
2
Melt and cast
Melt and cast
Melt the silver in a crucible with a pinch of borax, add the copper and stir until one even liquid, then pour into a warmed ingot mould as a thin bar.
Ibikoresho by'iyi ntambwe:
Ifu ya boraki1 as required
Amakara1 as requiredIbikoresho bikenewe:
Akabindi ka garafite n'ibumba
Itanura ry'amakara
Amakoro y'Icyombo Gishongesha
Imbumbe yo gusukamo icyuma gishongeye
Uturindantoki twihanganira ubushyuhe3
3
Draw the wire
Draw the wire
Hammer the bar round, file a taper and draw it hole by hole through the drawplate, annealing to a dull red with the torch whenever it stiffens, as copper wire is drawn.
4
4
Weighing sterling
Weighing sterling
Gupakira ikaye ya Jupyter…
Ibikoresho
4- 92.5 gUmwanya
- 7.5 gUmwanya
- 1 as requiredUmwanya
- 1 as requiredUmwanya
Ibikoresho bikenewe
6- Umwanya
- Umwanya
Iki gishushanyo gikora
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