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<p>[QUOTE=&quot;Figtree3, post: 242405, member: 33&quot;]Calotypes, also known as salted paper prints or salt prints, were an early process of printing photographs on paper. According to what I can see online, the use of salt prints declined after the mid-1850s. And of course the U.S. Civil War started several years after that. Albumen prints were much more popular by the time of the Civil War. However, this could well be a salt print, as far as I know. Some processes lingered on in use by some practitioners after they were less popular. Since your wife knows what calotypes were I imagine she is knowledgeable about antique photos.</p><p><br /></p><p>Here is some information about that type of process, from the Graphics Atlas:</p><p><a href="http://www.graphicsatlas.org/identification/?process_id=269" target="_blank" class="externalLink ProxyLink" data-proxy-href="http://www.graphicsatlas.org/identification/?process_id=269" rel="nofollow">http://www.graphicsatlas.org/identification/?process_id=269</a></p><p><br /></p><p>The above page has a great depth of information on how to identify that type of photograph. You can also look up albumen on that site to see the qualities of those.</p><p><br /></p><p>You didn&#039;t mention the size of this. Generally the carte-de-visite size was the most popular in the 1860s (2.5&quot; x 4&quot;). -- That is the size of the entire card, not just the paper print.[/QUOTE]</p><p><br /></p>

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