Society of Glass Technology · [Sheffield] · leaf 382
s veryfull of separated silica, and also some unmelted batch was present.All the other batches yielded glasses. (2) The glasses were coloured, varying from light blue in 181 Bto dark greenish-yellow in 181F, again indicating increased potattack as the PbO increased. The colour of each glass in this… … 10 15 20 25 Molecules of PbO. The Properties of the Glasses. 1. Density. The following table shows the densities of the various glasses,and a comparison of the two series is shown in Fig. 1. Table III. Series 100SiOj,,40Na2O,xPbO. Series lOOSiO^ONaaO.xPbO. MeltNo. 180.4BGDEF…
Glass
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