A method of reducing the lead and / or barium emission of lead and / or barium containing crystal glassware in contact with a liquid phase

摘要

The invention relates to a process for reducing the emission of lead and/or barium from lead- and/or barium-containing use articles made from lead- and/or barium-containing crystal glasses, in particular lead crystal and baryta glasses, on contact with a liquid phase, in particular aqueous, aqueous-acidic, alcoholic and aqueous-alcoholic liquids, for example acetic acid solutions, wine, whisky, liquors and the like, in which the crystal glassware is treated, optionally before and/or after acid polishing, with 5 to 45% strength by weight alkali metal hydroxide solution at a temperature of from 20 to 60 DEG C.