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<p>[QUOTE=&quot;Ownedbybear, post: 224585, member: 29&quot;]It&#039;s not always made from adding waste iron ore, Walter. Davidson and some other English makers simply mixed coloured glasses. </p><p><br /></p><p>Good article here:</p><p><br /></p><p><a href="http://www.glassencyclopedia.com/slagglass.html" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.glassencyclopedia.com/slagglass.html" rel="nofollow">http://www.glassencyclopedia.com/slagglass.html</a></p><p><br /></p><p>I think this may be a bit earlier than the 19th. The feathering is a bit uneven and it&#039;s thick.[/QUOTE]</p><p><br /></p>

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