Developing times for Bergger BPF 200 and HP5 in Rollo-Pyro

I just got my order of Rollo Pyro developer(Leban) delivered and I want to use it to process Bergger BPF 200 and HP5 film. Any suggestions for

time/temprature for N- N and N+ for those films in Rollo Pyro? I need

a starting point because I hate testing.

hello

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for BPF200 expose at 100 and develop 8 min

and for HP5 expose320 and develop 9 min

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but do you want to use it in tube or in tray?

hello again I use pmk for platinum print (zia printing)

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here are an old mail from leban about rollo pyro:

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Hello alt4s

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When I look for the latest correspondences about the pyro-developing

it

seems to me if most of you have equal problems with PMK like myself.

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The uneven staining and high base-fog problems in tray and also in

rotation-developing let me think about the reason-why.

I think the main problem is the air-oxydation combined with the

relatively

long developing time. To eliminate these facts should clean my

problems and

negatives.

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I made two modifikations on Hutching4s PMK:

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The first, to slow down the air-oxidation of the working solution, I

added

ascorbic acid as antioxidant to solution A.

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The second, to cut the developing times, I concentrated the working

solution (added more pyro and metol but also a small amount

Potassiumbromid

against fogging to Part A).

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Since I used this modifications I never had problems with the results

on

HP5+, FP4+, T-Max 100.

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For mid- and large-format this corrections have no bad effects on

negatives

(grain, sharpness etc..)

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So try it - and you have some problems less.

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When you work with ready to use packs from photographers formulary or

others you should use only 75% quantity water to make Part A and add

the

ascorbic acid and Potassiumbromid.

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If you make it yourself try his:

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Rezepture PMK mofdified by H.Leban

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PartA

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800 ml aqua dist.

20g Sodiumbisulfit, Sodiumhydrogensulfit

20g Metol

150g Pyrogallic acid

10g Ascorbic acid(Vit-C)

1,5g Potassiumbromid

2-5g EDTA-Na4

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Part B

300g Kodalk, Sodiummetaborat

5g EDTA-Na4

in 1l aqua dist.

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For normal and N+/N++/N+++ developing use: 1PartA + 2Parts B + 50

Parts

water

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Times for HP5+(at 400 ISO) 220C(720F) Rotation-Jobo

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N/6,5min

N+/8min

N++/9,5min

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For normal and N-/N- -/N- - -/N-3 developing use: 1Part A+2PartsB+

100Parts

water

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Times for HP5+ (at 400 ISO) 220C (720F) Rotation-Jobo:

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N/8min

N-/6,5min

N-2/5,5min

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These are my processing dates to get 8x10" negatives for

platinum/palladium

- maybe you have correct it for your work.

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I also process FP4+, T-Max100, Lotus View Classic100 and T-Max400 with

best

results.

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If you need a detailed Rezepture sheet and times for other films

please

contact me directly.

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Greetings from Austria

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Harald Leban

chemist and alt-photographer

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hlebanphot@compuserve.com

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Platinum prints at: http:\\www.aperture-photo.com (the platinum room)