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Platinum Wire: Sponge Rammed, Baked, Forged and Drawn, Ure 1839
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14. Ukwakira 2026NO
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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.
Hejuru
Three days

Amabwiriza

1

Pound and sift

Pound the platinum sponge in the mortar and pass it through a fine sieve.

Ibikoresho by'iyi ntambwe:

PlatinePlatine10 g

Ibikoresho bikenewe:

Isekuru n'UmuhiniIsekuru n'Umuhini
Akayunguruzo Gafite Urukoma RutoAkayunguruzo Gafite Urukoma Ruto
Umunzani w'ibiroUmunzani w'ibiro
2

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.

Ibikoresho bikenewe:

Umuyoboro w'icyuma wa milimetero 12Umuyoboro w'icyuma wa milimetero 12
Uruti rw'icyumaUruti rw'icyuma
Ifatiro ry'AmezaIfatiro ry'Ameza
3

Bake

Bake the bar 36 hours at the full heat of the kiln. It shrinks by a fifth or a sixth of its volume.

Ibikoresho bikenewe:

Itanura ry'ubushyuhe bwinshiItanura ry'ubushyuhe bwinshi
Amafashi y'umucuziAmafashi y'umucuzi
Uturindantoki tw'uruhu tw'akaziUturindantoki tw'uruhu tw'akazi
4

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.

Ibikoresho bikenewe:

IngoyiIngoyi
Inyundo ifite umutwe utambitseInyundo ifite umutwe utambitse
Amafashi y'umucuziAmafashi y'umucuzi
Itara rya PropaneItara rya Propane
Amakariso MenshiAmakariso Menshi
Uturindantoki tw'uruhu tw'akaziUturindantoki tw'uruhu tw'akazi
Amadarubindi y'umutekanoAmadarubindi y'umutekano
5

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.

Ibikoresho bikenewe:

Urubaho rwo gukurura insinga rw'icyumaUrubaho rwo gukurura insinga rw'icyuma
Ifatiro ry'AmezaIfatiro ry'Ameza
Koleyo yo gukurura insingaKoleyo yo gukurura insinga
IgishasharaIgishashara
Itara rya PropaneItara rya Propane
Ikigereranyo cya Digitale cy'Amasentimetero 6Ikigereranyo cya Digitale cy'Amasentimetero 6
Uturindantoki tw'uruhu tw'akaziUturindantoki tw'uruhu tw'akazi
6

How much wire

Gupakira ikaye ya Jupyter…

Ibikoresho

1
  • Umwanya

Ibikoresho bikenewe

18

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