Fogging does Benzotriazole work or buy new film

[smithdoor]

Witch works the best and how good does this work???
Benzotriazole or Potassium Bromide for fog on film or just get new film
Note the film is over 25 years old


Dave
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[garysamson]

You would have to run a test or two and adjust the EI of the film to be certain of the results. I think I would rather use new film with predicable results.

 

[NB23]

For me, potassium never really worked. Benzo did!!

For film id skip it. Not worth it. Only for paper.

 

[smithdoor]

Thank you all
I buying new film

Dave

 

[trythis]

How much old film and what type? Gonna toss it?

 

[smithdoor]

It is lford FP4 125 ISO 4x5 under the trade name Arista exp 96 purchase 1991 2 boxes seal and one box open a week ago
I have paypal acc.

Dave

 

[Newt_on_Swings]

I just shot through a box of 25 sheets plus x from around the same time period. I shot it at an ei of 50 and developed it in hc110 dilution b as well as xtol 1:1 both at 75f to try and cut dev times and fog. It worked well.

KBr is easier of the two to use and much cheaper as well, it's not hard to make a working solution of about 10% if you have a small scale. I use an ebay digital compact scale I got for $5, it zeros out easily, and has a resolution of .00 grams. Since your doing sheets it's even easier to pin it down, just keep on adding more into the developer until you get it to a point you like.

 

[Gerald C Koch]

In practical terns 10% potassium bromide and 1% benzotriazole are both effective and are used in the same amounts measured as liquids.

 

[smithdoor]

Does this work on paper too.

Dave

In practical terns 10% potassium bromide and 1% benzotriazole are both effective and are used in the same amounts measured as liquids.

 

[Gerald C Koch]

Does this work on paper too.

Dave

Yes, but each affects the image tone differently which is paper and developer specific. For example too much bromide with MQ paper developers can result in a greenish/olive tone with some papers.