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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.
Beginner
A day
Instructions
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.
Materials for this step:
Iron Sheet (Hammered)1 pieceTools needed:
Dividers
Tin Snips
Metal File
Welding Gloves2
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.
Tools needed:
Hardwood Block
Wood Gouge
Wooden Mallet3
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.
Tools needed:
Hardwood Block
Ball Peen Hammer
Blacksmith Forge
Blacksmith TongsWelding Gloves4
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.
Tools needed:
AnvilBall Peen HammerMetal File5
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.
Materials for this step:
Sand2 kgTools needed:
SieveBlacksmith Forge6
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.
Tools needed:
Welding Gloves7
7
How big a disc
How big a disc
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Tools Required
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