Posted by John on June 14, 2006 at 20:44:11 from 24.250.149.61 user Mcneacail.
I have always thought that the truth should not spoil a good yarn. It is much more salicious to think pommie came over in 1780 and not some children's doggeral in 1870. Accepting unquestionable your statements does not mean I have to forgo telling a much more exciting story.
Fine China can withstand the direct addition of boiling water, I should know I paid for enough fine bone chnia for my previous wife who then used it a lot. I bought my new and final wife some really nice bone china in Australia - $40 for 4 cups and saucers and they were immediately stored as to good for company and us. ah...... shoot me in the head. China is to be used and appreciated not stuck in some godforsaken cupboard. -- Interesting cupboard is actually cup added to board but now it is a closed space.
China facts:
What is soft porcelain, also known as bone china?
Soft porcelain, also known as soft-paste porcelain or bone china, consists of 50-60% bone ash or phosphates in the paste and a lower kaolin content than that used in hard porcelain. Because of the relatively low kaolin content, the firing temperature for soft porcelain is lower than for hard porcelain: soft porcelain is first fired at 1240-1280o C. Due to this lower firing temperature, soft porcelain does not have as high a tensile strength or resistance as hard porcelain.
In order not to crack the circumferential stress induced by the expansion of the heating must be resisted by the tensile strength of the material. I can not find the tensile strength of bone china to start the calculation.
JMN