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悉尼369168 发表于 2015-6-9 22:11 
watch your mouth! You think bone equals bone ash?
The first development of what would become known as bone china was made by Thomas Frye at his Bow porcelain factory near Bow in East London in 1748. His factory was located very close to the cattle markets and slaughterhouses of Essex, and hence easy access to animal bones. Frye used up to 45% bone ash in his formulation to create what he called ‘fine porcelain.’
The production of bone china is similar to porcelain, except more care is needed because of its lower plasticity and a narrower vitrification range. The traditional formulation for bone china is about 25% kaolin, 25% Cornish stone and 50% bone ash.
那你以为它为什么叫bone china?? |
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