Method of reducing the lead and/or barium emission of crystal gl

Details Method of reducing the lead and/or barium emission of crystal gl Method of reducing the lead and/or barium emission of crystal gl

1993-05-21

1994-12-13

Hastings, Karen M.

Glass manufacturing

Processes

With chemically reactive treatment of glass preform

65 31, C03C 2300

Patent

active

053726332

ABSTRACT:
A method is described for reducing the lead and/or barium emission of articles of crystal glass containing lead and/or barium, particularly so-called lead crystal and baryte glasses, on contact with a liquid phase, particularly aqueous, aqueous-acidic, alcoholic and aqueous-alcoholic liquids such as acetic acid solutions, wine, whiskey, liqueurs and the like, with the crystal glass objects being treated, if applicable before and/or after acid polishing, with 5 to 45% by weight of an alkali hydroxide solution at a temperature of 20.degree. to 60.degree. C.

REFERENCES:
patent: 3290193 (1966-12-01), Salzle
patent: 3389047 (1968-06-01), Lavin
patent: 3546037 (1970-12-01), Salzle
patent: 4332649 (1982-06-01), Salzle
patent: 4555304 (1985-11-01), Salzle
patent: 4981733 (1991-01-01), Dumas
patent: 4983199 (1991-01-01), Dumas
patent: 5232753 (1993-08-01), Cornier

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