Carbon: 64

// pigment process

Richard McGraw (1905-1978) was born in Iowa in 1905. His father was president of McGraw-Edison, Chicago.

Three patents were filed for McGraw Colorgraph:

Patent Date Title
 US2385599  March 1943 Color Photography [Ball & Plotin]
 US2422387  March 1943 Adhesive Temporary Support [Joseph Arthur Ball]
 US2626858  December 1945 Carbro Process [Richard F. McGraw]

The McGraw Colorgraph Company was sold to Carnation in 1953.