Image #1 shows large bubbles/foam. This is usually associated with traces of photoflo on the reel and insufficient developer volume, although this example is rather extreme.
Can you give the details of your development process, please?
Thank you!! the film is ilford HP5 the developer R09 I developed two films in the tank but had the problem only on one of them. any idae what happend to the second frame?
actually now i see that in this tank 600ml covers only one film....is that possible?
PS: Note that Jobo lists volumes primarily for rotary development; if you're doing manual inversion, you need much more developer obviously.
PPS: I think the 1520 is far more economical in terms of chemistry use when doing two rolls of 35mm.
even though when i checked now the tank on Jobo website the minimum is 270ml.
so what you are saying is that both films should be covered with the developer (obviously) when being developed manually.
when i was a student i had the peterson tank, and now i got this jobo from a friend, so i didn't really give it a thought...
Yes, it is. It requires only 485ml for 2x35mm rolls for inversion
That is for rotary processing, not manual inversion.
Yes, that's correct
I still use my Paterson regularly even though I have several Jobo tanks and reels!
Thanks @pentaxuser for confirmingI was too lazy to swivel my chair and check mine in the cupboard behind me...
it gave me something like 1100ml
I thank you very much anyway. this was very helpful and extremely important for next time
No problem, I'll try to explain again how to determine the amount of developer (and stop bath, and fixer) you need:
* Place both the (empty) 35mm reels on the tank's center column.
* Place the center column with both reels into the tank.
* Leave the lid off the tank.
* Fill the tank with water until both reels are submerged.
* Pour out the water into a measuring cup or graduate to determine how much it is. This is your minimum developer volume to use for two reels.
You can do the same for one reel of course
That's pretty close to what I would expect, indeed.
You're welcome and I hope you enjoy your stay here on Photrio
i think we solved the problem - not enough developer for 2 rolls....Air bubbles on B&W film should present as dark circles because they hinder development, they may have a slightly lighter edge, so unless reversal processed it's more likely something else. In addition, those lines are too long to be air bubbles.
It could be contamination, reels/spirals do build up a bit of gelatin over time from the wet emulsion surface and that combines with traces of wash aid,, and may retain some fixer.
U think the reels need a very good clean.
Ian
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