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<p>[QUOTE=&quot;Figtree3, post: 554487, member: 33&quot;]The workshop sounds like fun, too. Make your own ivorytype!</p><p><br /></p><p>By the way, last night I found two different definitions of Ivorytype in one of the photo history books in my collection. There was a process patented in England in 1855 in which &quot;photographic images were secured on the surface of artificial ivory sensitized with a coating of either albumen or collodion. When colored, these photographs resembled an ivory miniature portrait...&quot; (William Welling, <i>Collectors&#039; Guide to Nineteenth-Century Photographs</i>, p. 113).</p><p><br /></p><p>Welling goes on to briefly describe another process which I think is the one here: &quot;An American ivorytype process was introduced and exhibited for the first time by F. A. Wenderoth at the 1859 fair of the Franklin Institute in Philadelphia. By this and other competitive processes, a photograph could be colored and sealed in plate glass so as to exhibit the effect of an oil portrait when lighted from behind.&quot; (Ibid.)</p><p><br /></p><p>I notice that the description given of Wenderoth&#039;s process doesn&#039;t mention two images adhered to the glass. It also mentions &quot;other competitive processes.&quot; Perhaps one of those processes included the two images adhered to the glass. Welling&#039;s footnote for this info mentions <i>The History of Photography </i>by Helmut and Alison Gernsheim, p. 344. This is a well-known history. I don&#039;t have a copy of it. The note on the YouTube video indicates that Wenderoth&#039;s process was introduced in 1855, which is different from what Welling says. And I believe Welling got the info from the Gernsheim book.</p><p><br /></p><p>Anyway, the year may not be too relevant in this case but could be researched.[/QUOTE]</p><p><br /></p>

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