Society of Glass Technology · [Sheffield] · leaf 79
e cone 9 and cone 14 samples coincided withthe heating curves, but with the cone 06 sample this was notthe case. Farnley Fireclay (Fig. 4).—This was mixed by hand to a fairlysoft, plastic condition, moulded, dried, and burned to cone 06 inforty-eight hours and to cone 9 in seventy-two hours. The… … Fig. 4. was the case with the specimen fired to the higher temperature.The expansion to 900° was about seven-ninths of that observedon the cone 9 test piece, the difference between the two occurringmainly in the earlier part of the heating. The cone 06 specimenexpanded regularly to 500°, but the…
Glass
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