Don't you just love the internet, you can get any data you want, bad and good. Take your pick. Royal Pan was the fastest film of its day with an ASA of 1250. I would suggest D-76 as a developer as the grain is quit large. My developing data is quite old so some else may be able to give you a time. Jerry ________________________________ From: Bogdan <bkarasek@xxxxxxxxxxxx> To: pure-silver@xxxxxxxxxxxxx Sent: Thu, March 31, 2011 7:52:49 PM Subject: [pure-silver] developing Royal Pan sheet film. Hello all, I was doing an inventory of my darkroom freezer and found an unopened box of 100 4x5 sheets of 4141 Royal Pan film. Also a box of 3¼x4¼ Royal Pan; have holders and Graphic cameras for this size. Why waste good film , I say... Any ideas as to development times and possible ASA? A Google search gives 400 asa and 1250 asa for this film. I was thinking that maybe I should develop in Diafine. Any and all suggestions are welcome. Cheers, Bogdan