Hi - any help/advice about this will be gratefully received! I have been using the Stoeckler neg dev formula with roll-film for a while but am having trouble with "streamers" - small tapering trails of uneven density along the edges of so me negs on most rolls of film, usually in high density areas like skies. Not all the negs on one roll are affected.

As I intend to use 5x7 film soon (already got the camera, s/h Gandolfi) and like the effect of the Stoeckler formula (apart from the defects mentioned above) I want to know if I am doing something wrong or whether I should use a different d ev.

I agitate for 15 secs per min in sol. A and not at all in sol. B, although I hav e tried agitating for less time in A and for 5 secs each minute in B. I've also tried using a rod instead of agitation. I use distilled water to mix the chemi cals and a water bath to keep temp at 20 degrees C.

I don't use a stop bath of any sort between A and B and only a plain water rinse before fixing. My fix and washing routine work well with other devs that I mix - no probs here.

I have varied the time in both solutions - from 7 mins to 3 mins in A (standardised on 5 mins) and 3 mins in B (have tried 4 mins).

I bracket with rollfilm so am not too worried about losing a few frames (althoug h its always the one that looks best that is afected) but I am not prepared to w aste my time and money on this dev with 5x7 sheet film, so guidance/advice will be really helpful.

Thanks, Neil.