Dark spotting on negatives

[norm123]

Hi everybody

I did darkroom process since a long time but now I had some darks spots on my last negative, drop-shaped denser spots and I don't kow why.

I did a presoak without agitation, just with tap water. After, I did the development to a FP-4 with X-Tol 1+1, 10 minutes, 20 Celsius. I suspect the presoak too short. Maybe half of frames are OK and the other half is ruined.

Any idea?

Any suggestions are welcomed.

 

[jp498]

Could be light leaks or poor fixing. Throw it back in the fixer and see if that takes care of it. Show us a picture.