How to clean films from calcareous tracks ?

[Rom]

Habari everybody,

I hope this question has not been answer a couples of times but i do not find any solutions and want to take care about my film...

Ok so i have been washing fully my last roll of pan f + and after drying, it remains some tracks of calcareous.. I try to clean it with tetenal film cleaner sprayer but they are still there...

Do you have any solution ? System D is warmly welcome because i want to enlarge one capture from this film...

Edit : I forget, the film that i need to clean is Ilford Pan F+ 50 isos. So B&W but i guess it exists a common treatment for B&W film ?

Many thanks in advance

All the best

Rom

 

[Relayer]

try to wash in distilled water. I always put my films into distilled water after wash. time isn't critical - 1-2min

 

[Rom]

So you think i can try to rewash it a new time ?

 

[Relayer]

yes!

 

[Doremus Scudder]

Bojour Rom,

I believe you are referring to calcium deposits caused by rinsing in hard water and then drying.

The above post that recommends a distilled water rinse is correct, however, this will only work to prevent these deposits.

Once you have them, they can be rather difficult to get rid of. I would try using a rather strong dilution of fresh stop bath and soak the negatives in them for 5-10 minutes. Check periodically to see if the stains are dissolving. If so, you can simply give the negatives a 5 minute wash and then rinse the negatives (1 minute minimum) in distilled water and dry as usual.

If this doesn't work, you may not be able to get rid of the deposits. However, you can try more aggressive acid baths: stronger stop bath or even some commercial de-calcifying products may work (decalcifiers for steam irons or even toilet bowls).

Hope this helps some

Best,

Doremus Scudder
www.DoremusScudder.com

 

[RobertV]

Bonjour,

It's not specific for Pan F+ film but these spots and stripes can be prevented by using destilled water and a small amount of wetting agent in the last step.

Normally you can redo this. If you have a strong deposit of Calcium you can wash the film in a standard 1,5%-2% stop bath (15g/ltr. Citric Acid, or 2% Acetic Acid) (5 minutes) wash the film again and put it in destilled water with wetting agent (1 minute).

The problem should be solved then unless you have spotts within the negative.

Best regards, cordialement,

Robert

 

[glbeas]

I would add a dash of table salt to the stop bath to provide sodium ions that will swap with the calcium and enhance the solubility of the carbonates. This is the basis of the water softener systems.