Additional memo from Mr. Gumbinner 15 Fuji Photo Film

Using  their agent, Mitsui, Fuji Photofilm licensed the zirconium  patent and sent a crew to copy our plate line.  Among them was a chemist, Yonezawa.  My wife had the crew to our house in Tarrytown for dinner. We started to receive complaints that the image came off the plate in spots (walk off).  Mr .Halpern  knew a Mr. Moran who referred a chemist, Simon Chu, to him. He was hired.  He found that if a benzophenone was coated over the diazo it became water insolvent without changing the hardening by ultra-violet light. This solved the walk-off problem.  Later we found that if we used the benzophenone  to precipitate the formaldehyde condensed diazo we were making it could be used to make a plate which did not need to be lacquered to make many printed copies.