Society of Glass Technology · [Sheffield] · leaf 116
in determining its value. (4) Where the molecular CaO content is the same in the twoseries, the glass with the higher K20 has the greater jjd until aCaO content of about 36 molecules is reached. Then the twoglasses 100SiO2,40K2O,36CaO and 100SiO2,20K2O,36CaO have thesame jjd value =1 5442. The… … 1000 900 800 15 20 Molecules CaO.Fig. 2. E 2 52 .TOTTRKAL OF THE SOCIETY OP GLASS TECHNOLOGY. 0-00971 and 0*00943 respectively, that is, the refractive indicesfor the G and F lines are different. (5) In potash-lime-silicate glasses of the type 100SiO2,*K2O,yCaO,where x lies between 20 and 40…
Glass
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