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<p>[QUOTE=&quot;Aarone, post: 9772749, member: 83202&quot;]The amount of lead in fine glass is a complex subject and most glassware collector books don&#039;t go into that.&nbsp; They speak of broader categories eg. &quot;flint&quot; or &quot;non-flint&quot;; terms that are not scientific.</p><p><br /></p><p>Of course by the mid-1870s most pressed glass patterns were made with the revolutionary new soda-lime formula.&nbsp; And many firms reused earlier flint-era molds / patterns for this.&nbsp; But such glass is called &quot;non-flint&quot;.&nbsp; I haven&#039;t found any source saying that post-Civil War glass sold as &quot;flint&quot; had a significantly lower lead to soda ratio.&nbsp; It just looks like far less of that glass was made.</p><p><br /></p><p>This link has an 1890 recipe from the Dithridge Flint Glass Works in PA.&nbsp; It shows 33.5% lead oxide:</p><p><br /></p><p><a href="https://cutglass.org/BrilliantGlassEduc/A%20Guide%20to%20ABCG%20-%20Jim%20Havens/Part%201%20Havens/composition1.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://cutglass.org/BrilliantGlassEduc/A%20Guide%20to%20ABCG%20-%20Jim%20Havens/Part%201%20Havens/composition1.htm" rel="nofollow">https://cutglass.org/BrilliantGlassEduc/A Guide to ABCG - Jim Havens/Part 1 Havens/composition1.htm</a></p><p><br /></p><p>That goes on to note that this is the same percentage as other glass houses still making similar products, and happens to match the average value for &quot;lead glass&quot; for the whole eighteenth, nineteenth and into the twentieth centuries.&nbsp; Which is consistent with info on:</p><p><br /></p><p><a href="http://www.theglassmakers.co.uk/leadoxide.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.theglassmakers.co.uk/leadoxide.htm" rel="nofollow">http://www.theglassmakers.co.uk/leadoxide.htm</a></p><p><br /></p><p>So - there was / is a lot of flint EAPG, as those terms are commonly understood.[/QUOTE]</p><p><br /></p>

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