| 摘要 |
<p>A method of treating a surface layer of a lead crystal glassware comprises etching the internal surface of the glassware, at elevated temperature, to remove at least lead cations from the surface, to a predetermined depth; treating the etched surface by applying a coating of a paste, slip, slurry or solution containing non-toxic cations to fill the interstices of the lattice structure vacated by the lead etc. cations; and effecting thermal excitation of the coated surface to effect the cation exchange and to "cure" the surface. The invention also includes lead crystal glassware treated or manufactured by this method.</p> |
