While I have learned much from other processes such as kallitype and gravure, printing my images in carbon is the focus of my work.
The carbon transfer process was developed in the late 1800's as the ultimate archival alternative to period silver prints which were already starting to fade. However, carbon's appeal goes well beyond stability.
A well crafted carbon print can produce deep blacks, delicate highlights, a long tonal scale, and high acutance that few processes can rival. However, perhaps the most characteristic trait of carbon is surface relief. Carbon prints have a subtle surface quality that is difficult to convey in photographic reproductions.
Factoring in the time to make materials, individual carbon prints take hours to make and each is an individually crafted work of art. An excellent guide to the process and history of carbon is provided by The Getty Atlas of Analytical Signatures.