stains on film developed at home

I have been developing my BW film at home for a while. However, I recently got stains on the films I developed. I develop roll film, 120, in ID11 or D76 for about 10 minutes, standard procedure and never had this problem. What am I possibly doing wrong? It may be loading of my film or uneven developing. Am not sure, any suggestions?

Thanks a lot for your time.

What do the stains look like? If they are cloudy and seem to run from side to side, it may be improper fixing or lack of agitation during fixing.

Prashan,

If you could scan one of the affected negs and post an uncorrected image we might be able to determine what caused the staining.

In the meantime, check all your procedures (especially agitation), make sure your chemicals are fresh (especially developer and fixer) and that your timer and thermometer are accurate.

-P

Ordinarily I wouldn't send you somewhere else, but you also may want to ask at

http://www.apug.org/forums/home.php

It is probably the best known film resource and digital discussions are frowned upon over there. I am sure someone there knows.

Thanks a lot Dan, Preston and David.
Here is a small portion of the neg which I scanned quickly.

BW Developing Issue

From the example I say there is both crimping of the film and insufficient agitation. It looks like there are pinholes which indicate improper agitation. As there is no definition in the stained part I would hazard a guess the film may have crimped and not allowed developer to fully penetrate.

the film may have crimped and not allowed developer to fully penetrate. >>> so you mean it is a loading problem then?


And agitation during developing or using other chemicals?

It is hard to say without having the film in hand, but I suspect that is what happened. With too little space there was not enough room for the developer to flow around on the reel. The pinholes suggest insufficient agitation. Whether this was caused by the crimping or not enough agitation would be a guess. Could be both.