Strange stains on my b&w negative

[yael jerusalem]

Hi
On the last roll I developed i found really strange spots on my negative, does anybody here know what is the reason for this? it seems like 2 different problems.
Thanks!!

 

[koraks]

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?

 

[yael jerusalem]

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?

 

[koraks]

Is it possible the problem only appeared on the film that was on top of the other one in the tank?
What tank did you use and how much developer?

The defect on #2 might be related, but it's hard to make out how big it is and what it looks like in real life.

Can you post photos of the actual negatives (backlit) that exhibit the problems?

 

[yael jerusalem]

i used a jobo multitank2, tanksystem 2500, with 600ml of developer,
will try to photograph the film itself
actually now i see that in this tank 600ml covers only one film....is that possible?

 

[koraks]

actually now i see that in this tank 600ml covers only one film....is that possible?

Yes, and that's your problem, or at least a large part of it.

If you put both reels into the tank, simply fill the tank (without the lid installed) until the water covers both reels. Measure the volume of water you've used, and that's the safe minimum amount you need!

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.

 

[yael jerusalem]

i think you are right even though when i checked now the tank on Jobo website the minimum is 270ml.

Jobo 2520 MultiTank 2 (for roll or sheet film processing)

• Use for inversion or rotation processing • With 2502 reels, this tank will process up to 2 rolls of 35mm, 2 rolls of 120, or 1 roll of 120 • With...

www.catlabs.info

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...

 

[pentaxuser]

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.

Yes, it is. It requires only 485ml for 2x35mm rolls for inversion and only half that for rotation

pentaxuser

 

[koraks]

even though when i checked now the tank on Jobo website the minimum is 270ml.

That is for rotary processing, not manual inversion.

so what you are saying is that both films should be covered with the developer (obviously) when being developed manually.

Yes, that's correct

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...

I still use my Paterson regularly even though I have several Jobo tanks and reels!

Yes, it is. It requires only 485ml for 2x35mm rolls for inversion

Thanks @pentaxuser for confirming I was too lazy to swivel my chair and check mine in the cupboard behind me...

 

[yael jerusalem]

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 confirming I was too lazy to swivel my chair and check mine in the cupboard behind me...

sorry i don't understand the terms you are using, how much developer does one roll 35mm requier, and how much for two in this tank? i filled it with water to the top and it gave me something like 1100ml

 

[yael jerusalem]

I thank you very much anyway. this was very helpful and extremely important for next time

 

[Ian Grant]

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

 

[koraks]

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

it gave me something like 1100ml

That's pretty close to what I would expect, indeed.

I thank you very much anyway. this was very helpful and extremely important for next time

You're welcome and I hope you enjoy your stay here on Photrio

 

[yael jerusalem]

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

thank you!!!!! you are the best!!!!

 

[yael jerusalem]

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

i think we solved the problem - not enough developer for 2 rolls....

 

[Sirius Glass]

I hope we help you find a solution soon.

Welcome to APUG Photrio!!​

 

[mwdake]

I think the lack of solution was the solution.

 

[MattKing]

In case you were wondering, the smaller volume recommended is, as noted, in relation to rotary agitation. That is where the tank is turned on its side and rotated continuously. If you think about it, when you do that, you only need to half fill the tank - or at least add enough liquid to bring the top of the liquid up to the middle point of the tank. Continuous rotation then moves all the film through that liquid continuously - the film is always either fully immersed or still wet and soon to be immersed again.