Society of Glass Technology · [Sheffield] · leaf 318
s made to ascertain at what definitepoint the crystals or devitrified mass would disappear and thetemperature also to which the glass could be cooled withoutdeposition of crystals. These tests gave results as follows : Temperature at whichTest pieces. crystals disappear. S.I. A. 1130° S.I.T. 1115°…
Glass
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