Society of Glass Technology · [Sheffield] · leaf 156
. Although only fired to 1200°, it sintered so as tobecome almost vitreous, the squatting temperature neverthelessbeing higher than cone 30. The untreated clay was not goodenough for common saggars, and about 30 per cent, of impuritieswere removed to give the result stated. The Defloccidation and… … Fig. 1. is both cheap and simple. Fig. 1 shows the apparatus which I haveused for this purpose. It gives on the small scale all the resultswhich can be obtained on a commercial machine. A is a type metal rod 9 inches long and | inch in diameter. B isa copper can 6i inches high and 3^ inches in…
Glass
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