Amber
From George Eastman House : Notes On Photographs
A fossil resin from an extinct variety of pine tree found primarily in the Baltic States. Amber is found as a brittle yellow, amber, or reddish-brown translucent substance that is soluble in ether and chloroform. When the dissolved resin is mixed with alcohol, it makes a varnish used for collodion images.[1]
- ↑ Osterman, Mark. 2007. Amber. In The Focal Encyclopedia of Photography: Digital Imaging, Theory and Applications, History, and Science, ed. Michael R. Peres, 40, Focal Press.