strange rings on films

[Chine]

In the agriculture industry a lot of times adjuvants are added to some chemical applied, this often includes things like surfactants. The adjuvant has to work with the main solution, not changing how much is used but rather improving its performance.
This is sort of like adding a bit of photo-flo to the rinse water. The water is doing the rinse and the photo-flo is just helping the water achieve better contact with the film.
With the excellent information the others posted here I think you should be well on your way to having much better results. Looking forward to seeing how it goes.

the comparison between agriculture industry and darkroom products is captivating.
I'll tell you my next experiment.

 

[Chine]

Hi all,
last night I developed a new film and it is much better than previous.
Your advices were very useful, thank you very much.

 

[timor]