This is a reply I received from Sandy King, the creator of Pyrocat-HD. At the bottom are my questions:
Date: Tue, 25 Mar 2003 13:54:54 -0500
From: Sandy King
Subject: Re: Hi there, just tried your Pyrocat-HD and have a couple of questions (gee that's a surprise!
Thanks for the report. I am pleased that Pyrocat worked well for you.
I do not have a personal web site at this time but you can see some further information on pyrocat at http://unblinkingeye.com/Articles/PC-HD/pc-hd.html. You can also find at the same site a paper I did on UV printing sources for alternative printing if you are interested, with a few of my images.
To answer your questions, I have not tested Pyrocat with Delta 400. I am not sure if Clay tested it for the Unblinking Eye article. You might check with Pavel Babushkin at firstname.lastname@example.org. He has started to use Pyrocat and might have already done some tests with Delta 400.
I recommend the 1:1:100 dilution for silver printing, and the 2:2:100 dilution for alternative printing (platinum, carbon, kallitype, etc.). The reason is that we can get a much higher CI with the stronger dilution at the same development time and for most alternative work we need a negative with a greater density range.
My favorite film is Ilford FP4+ and it works great with Pyrocat. However, I have also used Pyrocat to good effect with TRI-X, TMAX-100, TMAX-400 and Ilford HP5+.
I recommend the presoak for all types of processing, but consider it only necessary for rotary processing, say in tubes or drums such as Jobo, BTZS, etc.
I have been participating in the photo.net site since December and enjoy it. What is the full address of the apug.org site?
Subject: Just tried Pyrocat-HD last night.
And was very impressed with the negs. Will probably print them Wed. night. I've heard so much about pyro I just had to try it for my self. I would like to find out more information on your developer, do you have a website or a posted FAQ anywhere?
I am sure you get many emails every day from interested photographers such as myself but if I may ask a couple of questions if the above resources aren't available I would really appreciate it.
1. can you use the Pyrocat-HD with Ilford Delta 400 successfully? If so what would be a good starting time?
2. the recommendation I was given was a 1:1:100 dilution, but I've heard that you now recommend 1:1:50. Is this true?
3. I prefer to use 400asa for 4x5, is there a particular brand that favors your developer?
4. how important is the pre-soak?
I noticed you on the Photo.Net site today, good to see you. We also have a great forum on APUG.ORG as well. Give us a whirl.