I have been using ADOX 25 5" x 4", exposing it as 25 ISO and processing it at 15 mins in Perceptol at 1:3;this has given good results. I have just brought some ADOX R09 (which is claimed to be like Rodinal), this is cheaper than Perceptol. ADOX reccomend under exposing the film by a stop (why they don't just rate it at 50 is beyond me) andthen R09 1 + 100 for between 36 - 42 minutes. i am processing 6 sheets at a time, in a tank designed for 12, which takes 1.4 lts to fill, so don't want to whaste to much chemistry. I would apreciate the views of any body who has used this film and processed it in R 09, partcuallrly about the times as 36 - 42 is quite a big margin!