Paul A Lehman

Patent picture

Using photographic patents as a source of information

Trying to find relevant sources of information for the surface relief properties of gelatin, Paul A. Lehman finds an unusual source to find answers: The patent archives. He shares his findings here. Each patent provides detailed information on emulsion ingredients, preparation and processes, which can be reproduced in a suitable home darkroom laboratory. Writer and photography / Paul A. Lehman Color and Gelatin Relief Emulsions U.S. Patents Issued to Michele … Read more

CarbroGel example print. Mission Door, San Antonio, Tx by Paul A. Lehman. 8"x9". Negative 1975. Print 1999.

Novel Experimental Approaches for Making Pigment Prints

After struggling with making Carbon Prints in the late 1990s, Paul A. Lehman explored alternative approaches to making pigment prints. Writer and photography / Paul A Lehman, MSc. WARNING: ADVANCED USERS ONLY: This process requires experience with photographic chemistry, safety equipment, appropriate laboratory procedures, and careful handling and disposal of hazardous chemicals. Read the SDS – Safety Data Sheet before use. Follow all recommended safety precautions, and use appropriate protective … Read more