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<p>[QUOTE=&quot;2manybooks, post: 3175344, member: 8267&quot;]The color looks like an albumen photographic print. This type of photograph was made on very thin paper because the preparation process involved floating the paper on a solution of egg whites containing the light sensitive chemicals. For the usual portraits, the print would be mounted on sturdy paper card stock (carte-de-visites, cabinet photos, etc.). In this case, it looks like it has been mounted on &quot;drafting cloth&quot;.</p><p><br /></p><p>&quot;Drafting cloth is among the most common supports found in 19th and early 20th century architectural and technical drawing collections. Introduced in the 1850s, this flexible, durable alternative to paper was used primarily by architects and engineers for process drawings, tracings, and reprographic prints (e.g. blueprints, diazotypes). The fabric is typically cotton or linen, which has been starched and calendered to create a smooth, glossy drawing surface.&quot;</p><p><a href="https://psap.library.illinois.edu/collection-id-guide/supportsarchrepros" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://psap.library.illinois.edu/collection-id-guide/supportsarchrepros" rel="nofollow">https://psap.library.illinois.edu/collection-id-guide/supportsarchrepros</a>[/QUOTE]</p><p><br /></p>

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