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<p>[QUOTE=&quot;Oldhoopster, post: 7484618, member: 84179&quot;]IMO, I wouldn&#039;t clean it anymore.&nbsp; Components of the glass could have selectively leached out over time and caused weak areas.&nbsp; The romans were pretty good at making glass, but raw material variability could cause problems over time.&nbsp; I think it looks pretty good as is.</p><p><br /></p><p>The Corning Museum of Glass has an extensive collection of ancient glass.&nbsp; They may be able to advise you of conservation techniques.&nbsp; I would occasionally spend my lunch hour wandering around the museum and the research staff were always helpful.&nbsp; </p><p><br /></p><p>Most of their collection is cataloged.&nbsp; Here is something that has a similar appearance.&nbsp; You might want to compare the level of conservation on your piece to those in their collection. </p><p><br /></p><p><a href="https://www.cmog.org/artwork/jar-1?search=collection%3A57a2228df4d55907ad85073f8cccdbcb&amp;page=14" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.cmog.org/artwork/jar-1?search=collection%3A57a2228df4d55907ad85073f8cccdbcb&amp;page=14" rel="nofollow">https://www.cmog.org/artwork/jar-1?search=collection:57a2228df4d55907ad85073f8cccdbcb&amp;page=14</a></p><p><br /></p><p>Finally, I have no advanced knowledge, but I would suspect that counterfeits do exist.&nbsp; With some glass composition, glass blowing, and chemistry knowledge, I think it would be possible to make fakes that would fool a novice or intermediate collector (same as numismatic fakes).&nbsp; CMoG may be able to provide information on counterfeit identification.&nbsp; Worth asking.[/QUOTE]</p><p><br /></p>

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