Formulary Sodium Sulfite Powder

Auroraua · Mar 2, 2014

I happened to order this, but now I have totally forgotten why. No idea what this is to be used with or for what.

I have some old films, such as Svema and Orwo and I thought I needed both an anti fog agent as well as a hardener.
So perhaps I bought it in order to mix with the fixer, but not sure.

What would you use such a thing for?

www.freestylephoto.biz/101340-Formulary-Sodium-Sulfite-Po....
thanks in advance

pdeeh · Mar 2, 2014

Sulfite is such a basic ingredient in so many photographic formulae it's hard to know where to start ...

Auroraua · Mar 2, 2014

What should I use it with?
The fixer? or the hypo?
Mix it with the fixer?
I am planning to use Kodak hardening fixer

for they hypo
Ilford wash aid
or
Kodak hypo clearing agent.

I know I was a bit silly not to remember why I ordered it in the first place.
I am not planning on mixing my developer/fixer or other chemicals from scratch which it seems this is used a lot for.

Steve Goldstein · Mar 2, 2014

You can use 20 grams per liter of water for wash aid.

Gerald C Koch · Mar 2, 2014

You don't use it with things you make things with it. For example the developer D-23 which has only two ingredients, metol and sodium sulfite.

Auroraua · Mar 2, 2014

So basically it was silly of me to purchase it.
From what I understand I can mix it with a non-hardener fixer in order to make it a hardener fixer or is it just for devloping?

I apologize for silly questions, but chemistry is not my strong side

Bill Harrison · Mar 2, 2014

Sod sulfite

Borrow from your public library, a copy of The Darkroom Cookbook by Steve Anchell . it will answer any question you may have about photo chemistry, formulas and film developing. You'll prob end up buying your own copy.

Ken Nadvornick · Mar 2, 2014

Normally one would buy sodium sulfite with a specific formula in mind. As mentioned above, it's an ingredient. Not an additive. It's a part of the recipe of literally hundreds of photographic processing formulas, primarily as a preservative. But there are other more subtle reasons for its use as well.

The only sulfite-only formula I can think of at the moment would be a 2% solution used as a poor man's hypo clearing agent.

If you have purchased some of this chemical in error, consider becoming an APUG Subscriber (which allows access to the APUG Classified advertisements, as well as the photo galleries) and post it as a For Sale item. You will likely recover most of your money from someone with a working darkroom. And possibly break even on the APUG subscription price, which would be an equally good deal.

Ken

Hexavalent · Mar 2, 2014

Auroraua said:
So basically it was silly of me to purchase it.
From what I understand I can mix it with a non-hardener fixer in order to make it a hardener fixer or is it just for devloping?

I apologize for silly questions, but chemistry is not my strong side

Sulfite is not a hardener.
Kodak fixer used to come with a small bottle of hardener which is just alum and sulphuric acid.

gleaf · Mar 2, 2014

Sodium Sulfide is the ingredient for Ammonium based fixer test solution. Sulfite have not happened to need yet.

Auroraua · Mar 3, 2014

Sorry I don´t really understand your answer.

Xmas · Mar 3, 2014

Ken Nadvornick said:
Normally one would buy sodium sulfite with a specific formula in mind. As mentioned above, it's an ingredient. Not an additive. It's a part of the recipe of literally hundreds of photographic processing formulas, primarily as a preservative. But there are other more subtle reasons for its use as well.

The only sulfite-only formula I can think of at the moment would be a 2% solution used as a poor man's hypo clearing agent.

If you have purchased some of this chemical in error, consider becoming an APUG Subscriber (which allows access to the APUG Classified advertisements, as well as the photo galleries) and post it as a For Sale item. You will likely recover most of your money from someone with a working darkroom. And possibly break even on the APUG subscription price, which would be an equally good deal.

Ken

The hypo clear is ok.
Selling it ok as well.

cmacd123 · Mar 3, 2014

Edwal FG-7 used to have one way to mix it that called for 1 oz of concentrate, and 1 fl ounce! of sulphite in 15 oz of water to make 16 oz of developer. The Kids in my camera club when I was in high school used to love this mix which was also supposed to give an effective speed increase.

They don't sell FG-7 here in canada anymore so I am not sure if they still push this. At the time every bottle came with a Green Plastic cup to measure the developer and sulphite.

Formulary Sodium Sulfite Powder

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