the plate is clear where it was not exposed to light. To make a albumen print from a collodion negative, float a sheet of paper on a solution of albumen (egg white) that contains a cloride. Dry.

in the dry state. GenPlates are high-density, 384-well plates that contain 6-mm discs of FTA™ paper (Whatman) molded into a hemispherical shape (Fig. 1). FTA is a macroporous cellulose filter ...