The photo is platinum print, one of the materials frequently used by photographers of the time.
He also left them in their matte condition that was inherent with platinum print.
Most of the images were toned platinum prints in pristine condition.
These black-and-whites, many of them platinum prints, are framed in groups.
Between 1992 and 2001 he made 5 portfolios of editioned platinum prints.
They are both platinum prints with a warm sepia tone.
Willis made the first platinum print in 1873 and patented it, but the process was imperfect, attracting little interest.
A platinum print provides a broad scale of tones from black to white.
Mr. Partridge, also a photographer, made the show's platinum prints.
This stunning exhibition presents 199 of Lincoln's severely beautiful platinum prints.