Bogdan hi, My experience with Diafine was very high base plus fog. If you want split development, divided D-23 worked well, if you want to control grain clumping Di-Exactol might be good choice because of the tanning of the gelatin, also it controls contrast well, my experience with Royal Pan 120 was that it produced fairly high contrast negatives. Over all I liked the film, in today?s world Fuji Neopan 1600 might be very close. Jonathan [mail1@xxxxxxxxxxxxxxxxx] From: pure-silver-bounce@xxxxxxxxxxxxx [mailto:pure-silver-bounce@xxxxxxxxxxxxx] On Behalf Of Gerald Koch Sent: Friday, April 01, 2011 8:51 AM To: pure-silver@xxxxxxxxxxxxx Subject: [pure-silver] Re: developing Royal Pan sheet film. 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