Rollei Pan25 in 120 - Pull 1 stop?

[lifein2x3]

Hey, folks. I just picked up a box of Rollei Pan25 120 from Freestyle, I've been looking to try some for awhile. I just got (really) bored and shot a series of 4-minute exposures using two 500 watt hot lights of a glass of ice melting; I rated the film at ISO 12.

Any suggestions for pull processing? I have Rodinal, HC-110, Ilford DD-X, D-76, Ilfosol-S and T-Max Developer available to me. I'm going for long tonal range and acutance, if possible.

PS- I couldn't find any information on reciprocity failure, either. Any helpful tips?

 

[Rolleijoe]

I've shot the Rollei Ortho25 (super-ultra fine grained film...nearly impossible to use a grain focuser with) but not the regular Rollei25. For processing, I used Rodinal 1:50 for 10min @ 20? and the results were fantastic. Very easy to print.

 

[Fotohuis]

Some developing info you can find here:

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About the reciprocity failure there are no practical tests done with this film only the theoretically compensation calculated from the graph like the data known by APX 25 (Agfa) and NP15 (OrWo).

Schwarzschild-Effekt; Reciprocity effect; Effet Schwarzschild; Efecto Schwarzschild
Exposure reading (seconds) 1/10 000 – ½ 1 10 100
Exposure adjust-ment (f-stops) none + 1 + 1½ +2
Development correction (%) none none none none

The only fine grain slow/medium speed film I know without correction till 2:00 Min. is the Fuji Acros 100.
You can develop this film with very fine grain exposed for E.I. 50 in Rollei L.S./CG512.
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But if you like acutance I should go for a Rodinal development with Rollei PAN 25 or the AM50 (Type Tetenal Blue/Beutler receipt) which is available in Europe only.


Best regards,

Robert