Society of Glass Technology · [Sheffield] · leaf 436
15 per cent,of K20) gave at first an increase of refractive index, but this wasreversed at about 15 per cent, of B203 to 100 per cent, of glass.* The attack of air containing water vapour on alkali silicateglass was intensified by heating to 80° with air saturated withmoisture, the effect being… … /ft-^jTo \00%SlUCW£ GuSS (a) temperature of the vapour, (b) time of action, (c) conditionof the polished surface, (d) chemical composition of the glass.Alkalies increased the rate of adsorption, whilst lime, zinc oxide,baryta, and boric oxide decreased it. The rate of action bore norelationship to…
Glass
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