Society of Glass Technology · [Sheffield] · leaf 130
d of incipientdevitrification. It was found impossible to obtain data fromglasses Nos. 10 and 11 at temperatures above 700° and 725° re-spectively, owing to devitrification occurring in each rod used. These data (Table III) serve to show that as the amount of limeis increased and the amount of soda… … 480 520 560 600 640 680 720 760Temperature. Fig. 8. to be expected from the progressive rise in the annealing tem-perature as the substitution of lime for soda is effected.* Thefigures also indicate that, for each glass, the mobility increasesvery rapidly as the temperature is raised, but a better…
Glass
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