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<p>[QUOTE=&quot;Figtree3, post: 9262172, member: 33&quot;]I agree...</p><p><br /></p><p><br /></p><p><br /></p><p>Yes...</p><p><br /></p><p>The author of the following site (phototree dot com) has done a lot of research on dating all sorts of images. I&#039;ve found his work especially helpful for dating images on paper. But I mostly collect those. He is not infallible, but his page about ambrotypes states</p><ul> <li>Ruby-colored glass was used (dark green also, but is very rare) beginning about <b>1858</b>. This eliminated the need to have a dark backing.</li> </ul><p><a href="http://phototree.com/id_amb.htm" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://phototree.com/id_amb.htm" rel="nofollow">http://phototree.com/id_amb.htm</a></p><p><br /></p><p>Ambrotypes disappeared from use by the late 1860s.[/QUOTE]</p><p><br /></p>

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