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Glass
(1,832 words)
(ὕαλος;
hýalos or ὕελος;
hýelos,
vitrum) [German version] I. Methods of Glass Production Glass is a mixture of silicic acid (silicon dioxide, quartz or quartz sand) and alkali (soda, sodium bicarbonate or potash) as flux [2; 7; 8]. Since it was apparently unknown in antiquity that alkali makes the mixture water-soluble, only glass with sufficient lime to neutralize this reaction is preserved. Producers of raw glass (ὑελέψης;
hyelépsēs or ὑαλοψός;
hyalopsós) knew from experience which sand (ψάμμος ὑαλικός;
psámmos hyalikós) or which calcareous plant ashes made the glass durable. Up i…
Source:
Brill’s New Pauly
