Dalton, MA: Heliochrome Press, 1988. First edition. 4to., xvi, 217 pp., numerous text illustrations. Illustrated stiff wrappers. Small faint damp spot at the blank top margin of the first 25 pages. Near fine. Item #52581
Includes a history of the process, with illustration, and the only modern step-by-step procedural manual for this photomechanical process.