The Comparative Effects of Soda and Potash in Lead Glass for Table Ware
T120-T125 (6 pages)
The scarcity and consequent high price of potash in this country during the war led to a very great reduction in its use, and to the substitution of soda in its stead. We have from time to time been consulted in regard to troubles experienced as the result of this substitution. Some of them were due to replacement of potash by soda weight for weight instead of in molecular proportion, but others have been due to specific differences in the effect of soda and potash. It seemed both of interest and importance to carry out some tests on glasses in commercial use in order definitely ascertain in what way soda- and potash-lead glasses differed in durability, in particular, but also in melting and working properties.
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