Starting time for Bergger BPF 200 in PMK

[David R Munson]

Just got a couple of boxes of Bergger BPF 200 to play with and want to develop i n PMK. I'm just looking for a starting point for development time, assuming I r ate it at the given speed of 200. For those who have used it, any reason I shou ld rate it at 100 or whatever, or is it actually pretty close to 200? Thanks

[josh_560]

Hi david at this website (http://www.jackspcs.com/pmk.htm) they say 11 min @ 70 degrees for N. I think those times are straight from Hutchings himself. I remeber reading an article by Hutchings about bergger and I think he said to rate it at 100. I have never tried this film before so I dont know first hand.-J

[Guillaume Zuili]

Hi, I use it in Jobo drum. Iso 64 and 25 minutes in PMK. It's flat...Oxidation problem I guess. I just got the Rollo Pyro from B&S,I'm going to test it. They give 100 for 9 minutes.

[Doremus Scudder]

David, Here, FWIW, are my times for Bergger BPF 200 in PMK.

N-2: ISO 807.5* minutes N-1 ISO 100 9.25 minutes N ISO 160 13.25 minutes N+1 ISO 160 16.5 minutes N+2 ISO 250 20.5* minutes

[Doremus Scudder]

David,

Let's try this again (sorry about the above post, I hit the submit button accidentally while copying in the information).

Here, FWIW, are my times for Bergger BPF 200 in PMK.

N-2: ISO 80 7.5 minutes

N-1: ISO 100 9.25 minutes

N: ISO 160 13.25 minutes

N+1: ISO 160 16.5 minutes N+2: ISO 200 20.5 minutes

Note that these are for distilled water and 68 degrees F. I have found that water quality affects the activity of PMK quite a bit. I have a separate set of time approximately 10% less for developing with my tap water in Europe. Also, I use graded paper, not VC so these times will be appropriately longer. As always, these work for me, but are only starting points. Hope this helps a little. ;^D)

[Doremus Scudder]

I'm not with it today!! I neglected to mention for the above times that I develop 4x5 sheet film by hand in trays. I agitate by shuffling once through the stack every minute regardless of the number of films, i.e. one shuffling (one film from the bottom of the stack to the top) every 15 seconds for four films, one every 10 seconds for 6 sheets, etc. One sheet gets a lift out and back in every 30 seconds. If you also develop in open trays be sure to use gloves! Regards again. ;^D)

[Urs Bernhard]

As all BERGGER Products (Film and Paper) are straightaway FORTE products, you ca n go with the time given for Fortepan 200. Good luck! Urs Bernhard

[Anselmo DiMedici]

I usually don't step into these conversations, but for the record. Bergger and Forte films and papers are not the same products. If you would simply try them side by side, you'd see the differences. Guy Gerard's family has been in the photo paper business for over 137 years, so quite frankly these types of statements are an insult. End of story...

John Horowy Vice President of Sales Bergger Products, Inc.