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Platinum Wire: Sponge Rammed, Baked, Forged and Drawn, Ure 1839
No furnace of 1839 could melt platinum, so it was worked like a powder. Andrew Ure: pound the spongy metal, sift it, ram it hard into a cylinder, and bake it 36 hours in a kiln; pure platinum then forges into any shape. Forge a thin rod and draw it down through a drawplate to wire.
The picture: our diagram of the five stages.
高级
Three days
说明
1
1
Pound and sift
Pound and sift
Pound the platinum sponge in the mortar and pass it through a fine sieve.
此步骤所需材料：
铂10 克所需工具：
研钵与研杵
细目筛
等臂天平2
2
Ram it hard
Ram it hard
Fill a short steel tube with the powder, put a close-fitting rod on top as a rammer and squeeze it in the vice as hard as you can, adding powder until the tube is packed. Push the pressed bar out.
所需工具：
12 毫米钢管
铁棒
台虎钳3
3
Bake
Bake
Bake the bar 36 hours at the full heat of the kiln. It shrinks by a fifth or a sixth of its volume.
所需工具：
高温窑
铁匠钳
皮革工作手套4
4
Forge a rod
Forge a rod
Forge the bar on the anvil into a round rod, reheating it with the torch whenever it stiffens. File a point on one end.
所需工具：
铁砧
横向楔头锤铁匠钳
丙烷喷灯
锉刀套装皮革工作手套
安全眼镜5
5
Draw
Draw
Wax the rod, push the point through the first hole of the drawplate held in the vice, grip it with the draw tongs and pull through. Go down hole by hole, annealing it red with the torch every few draws, until the caliper reads the size you want.
所需工具：
钢制拉丝板台虎钳
拉丝钳
蜂蜡丙烷喷灯
6 英寸数显卡尺皮革工作手套6
6
How much wire
How much wire
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