Artist Francis Baker official site gum bichromate, gum dichromate, historical process photography, cyanotypes, alternative process photography, van dyke types, conceptual photography, conceptual art, sculpture, carbon fiber, hearts, mold making View artworks by Francis Baker including alternative process photography and sculpture. Francis Baker's photographic output includes works in the gum bichromate process and other historical photographic processes. He is a conceptual artist living and working in Oakland, CA.