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Refractory Cement: Clay, Iron Filings and Manganese, Fired Hard (Spon's Workshop Receipts)
A fireproof and waterproof cement from Spon's Workshop Receipts: dried clay, clean iron filings, peroxide of manganese, sea salt and borax, ground fine, wetted to a thick paste, applied at once and then heated slowly almost to white heat.
Fired, it is very hard and stands both red heat and boiling water.
Source: Spon, Workshop Receipts, first series, p. 24. Picture: the recipe.
初学者
Unknown
说明
1
1
Dry and powder the clay
Dry and powder the clay
Dry 4 or 5 parts of clay thoroughly and pulverize it.
此步骤所需材料：
矿坑生黏土1 4 or 5 parts所需工具：
研钵与研杵2
2
Mix the powders
Mix the powders
Add 2 parts of fine iron filings free from oxide, 1 part of peroxide of manganese, 1/2 part of sea salt and 1/2 part of borax. Mingle them thoroughly and make the mixture as fine as possible.
此步骤所需材料：
铁屑1 2 parts, fine, free from oxide
二氧化锰（软锰矿）1 1 part
粗海盐1 1/2 part
硼砂粉1 1/2 part所需工具：
研钵与研杵3
3
Make the paste, apply and fire
Make the paste, apply and fire
Work the powder into a thick paste with as much water as it needs, mixing thoroughly. Use it at once. After applying it, heat it gradually, almost to a white heat.
此步骤所需材料：
水1 个所需工具：
研钵与研杵材料
6- 1 4 or 5 parts占位符
- 1 2 parts, fine, free from oxide占位符
- 1 1 part占位符
- 1 1/2 part占位符
- 1 1/2 part占位符
- 1 个占位符
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