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Quartz Sand: Washed and Burnt Glass Sand (Pellatt, 1849)
How an English flint-glass house made its sand fit for glass in 1849: Isle of Wight sand, low in iron, washed by hand in about eight waters to take out chalk and other impurities, dried or burnt in a heated arch called a calker, then sifted through a lawn sieve.
The washing takes away about one fifth of the sand's bulk.
Source: Apsley Pellatt, Curiosities of Glass Making (1849), pp. 35-36. Picture: the book's text.
初学者
Unknown
说明
1
1
Wash the sand
Wash the sand
Wash Isle of Wight sand by hand in about eight waters to cleanse it from chalk and other impurities. It loses about one fifth of its original bulk.
此步骤所需材料：
砂1 Isle of Wight sand所需工具：
水
箍木盆2
2
Dry or burn it in the calker
Dry or burn it in the calker
Pass the washed sand through a heated arch called a calker and dry it thoroughly, or burn it, at the operator's discretion.
所需工具：
反射炉3
3
Sift through a lawn sieve
Sift through a lawn sieve
Sift the sand through a lawn sieve to separate the larger grains and pieces of coal or coke, and burn off the vegetable matter.
所需工具：
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