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Sand Bath in a Sunk Iron Pan
A sand bath is a pan of sand set over the heat. A flask or dish bedded in the sand is warmed on all sides, not just on the bottom. Alchemists already used it. Here a shallow pan is hammered from iron sheet into a hollow and then filled with sieved sand.
The picture: our diagram of a flask bedded in sand in an iron pan over a fire.
初学者
A day
说明
1
1
Cut the disc
Cut the disc
Scribe a circle on the iron sheet with the dividers and cut it out with the snips. File the edge smooth.
此步骤所需材料：
铁板（锻打）1 个所需工具：
两脚规
铁皮剪
金属锉
电焊手套2
2
Carve a hollow
Carve a hollow
Gouge a shallow round hollow into the end grain of a hardwood block, about as deep as the pan will be.
所需工具：
硬木块
木工圆凿
木槌3
3
Sink the pan
Sink the pan
Hold the disc over the hollow and hammer it down in rings from the rim toward the centre, turning it as you go. Sinking stretches and thins the sheet, so go evenly. If the iron stiffens, heat it red in the forge and let it cool before going on.
所需工具：
硬木块
圆头锤
铁匠炉
铁匠钳电焊手套4
4
Flatten the bottom
Flatten the bottom
Planish the bottom flat on the anvil so the pan sits steady over the fire, and file the rim level.
所需工具：
铁砧圆头锤金属锉5
5
Fill with sand
Fill with sand
Sieve the sand, dry it by heating it in the pan, and leave a layer about 3 cm deep.
此步骤所需材料：
砂2 公斤所需工具：
粗筛铁匠炉6
6
Use it
Use it
Set the pan over the heat and bed the flask or dish partly in the sand. The sand carries the heat to all sides of the vessel.
所需工具：
电焊手套7
7
How big a disc
How big a disc
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