Society of Glass Technology · [Sheffield] · leaf 113
s l£ mm. thick as found by actualpractice without a knowledge of the correct cooling curve for thisparticular glass; but from a comparison with other known curvesthe best lehr temperature for rapid re-annealing is identical with e2 52 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. the critical cooling… … Minutes.Fig. 5. The effect of temperature gradient and the cooling rate are shownin Fig. 5, the results below being obtained on soft soda tubingwith lj mm. wall:— Curve Xj (one hour in original lehr). Longitudinal strainpresent; cooling therefore too rapid. On packing inasbestos fibre, re-annealing…
Glass
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