AFAIK Agfa 304 is only mildly acidic. Acidity only comes from the small amount of potassium metabisulfite in it. Acidity is not a concern with Agfa 304.
Jsut a question about the Rapid fix Agfa 304. Are there side effects if I use it for silver emulsion on metal or glass? I ve heard that it is advisable to reduce acidity as much as possible to avoid the emulsion peeling off. Someone working with emulsion on glass uses (as a precaution) just water as a stop bath and, for fixing, a standard fixer (which I guess is less acid?).
But again, I am really not knowledgeable about photographic chemistry...
AFAIK Agfa 304 is only mildly acidic. Acidity only comes from the small amount of potassium metabisulfite in it. Acidity is not a concern with Agfa 304.
Not what I read:
Nope. If you look at the msds for Kodak rapid fixer the concentrate pH is 5 and for Ilford rapid fixer the pH is 5.1.4. That's a normal pH for any rapid fixer.
Nope. If you look at the msds for Kodak rapid fixer the concentrate pH is 5 and for Ilford rapid fixer the pH is 5.1.
It seems that Agfa 304 is more acid than normal rapid fixer. Admitted I only tried it once but it did give a cloudy deposit on re-use, unlike proprietary fixer.
Thank you. Some questions for you too
- How do you do two-tray fixing?
- Do you have a suggestion for rapid fixer?
Two tray fixing is using two trays, both with fixer, sequentially, to fix paper. The majority of fixing will take place in the first tray, the second tray will definitely complete fixing. With regular fixer, it's probably not a good idea to rely on a single tray.
I'd advise buying any ready-made rapid fixer, since it will almost certainly be more economical than making your own.
making your own rapid fix has a similar economy as buying ready-made but has the benefit of always being fresh and only preparing as much as you need.
| ammonium thiosulfate @60% | 200ml |
| sodium sulfite | 15g |
| sodium metabisulfite | 5g |
| water to make 1.0 liter |
I have calculated TF-3 ingredients (from FDC formula ) for 1 litre working solution with ammonium thiosulfate granules (I could get ammonium thiosulfate in granular form only, here in India). The formula is as below —
1. Warm water – 600 ml.
2. Ammonium thiosulfate – 96 gms.
3. Sodium Sulfite – 12 gms.
4. Sodium Metaborate – 1 gm.
5. Water to make 1 litre.
The pH of the fresh solution is 7.6
Clearing time for PanF+ in fresh solution @ 20°C is 1 minute 25 seconds.
making your own rapid fix has a similar economy as buying ready-made but has the benefit of always being fresh and only preparing as much as you need.
Hello, I am looking for a simple fixer formula. On a chemical supply store I have found this formula.
"To prepare 1 liter of fixer, mix:
There is no info about dilution and fixing time.
- 240g of Sodium Thiosulfate
- 10g of Sodium Sulfite
- 60ml of Sodium Bisulfite"
Would you recommend? and could you help with providing info about dilution and fixing time?
Thanks
Emilio
Kodak F-24 is an excellent choice.Not sure about the 60ml 0f sodium bisulfite.
I am mixing Kodak Fixing Bath F-24, formula from the KODAK Processing Chemicals and Formulas data booklet.
50 degrees C water 500 ml
Sodium Thiosulfate (Pentahydrate) 240g
Sodium Sulfite (Anhydrous) 10g
Sodium Bisulfite (Anhydrous) 25g
Cold water to make up to 1 litre
Suitable for films, plates, or papers when no hardening is desired.
For satisfactory use, the temperature of the developer, rinse bath and was water should not be higher than 20 C (68 F)
Do not dilute for use.
Kodak F-24 looks very much like the formula that you found.
+++++++++++++++++++++
I found your question as I was looking for the substitute to Sodium Bisulfite. I think it is Sodium Metabisulfite. Used measure for measure.
I found a series of posts here recently, and if remember correctly the outcome was, that the Sodium Metabisulfite is interchangeable, also the Sodium bisulfite is not very stable when kept on the shelf long term.
Can anyone confirm this and possible give me a link to the conversations that I am talking about?
It could be a good idea in the future to add a label to my developer, fixer etc. with the formula of the contents.
Thank you.
Many Thanks Alessandro.
I will write it down in my book of facts for the future.
How did we manage before the internet?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?
We use cookies and similar technologies for the following purposes:
Do you accept cookies and these technologies?