Hi,
Maybe is a stupid question, but I don't know how long I can storage the solutions Nr1 and Nr2.
I keep my bottles solution in my fride inside a plastic box.
It's better for me to buy the powder chemicals and make the solutions by myself and storage them for short time?

Best

Stefano Germi
Italy

"...until the cows come home." (It's late and it's been a long day -sorry"

...how long I can storage the solutions Nr1 and Nr2.
I keep my bottles solution in my fride inside a plastic box.

Once mixed into solution, I believe they start to deteriorate...

...It's better for me to buy the powder chemicals and make the solutions by myself and storage them for short time?


Yes, it would be better to buy dry chemicals (which have a MUCH longer storage life) and mix up the small amounts as required.

joe :)

I but ferric oxalate as a powder because it is cheaper, easier to ship and I can buy in larger quantities to mix as needed.
Once mixed, I have found it keeps a very long time in the refrigerator. One of the batches I am currently using was mixed in July, 2002. It stills clears well. Lack of clearing highlights is a first sign of deteriation.

I've been thinking to buy powder chemicals for my pd/pl prints, and before I read your reply in this forum I tought that the life of solutions were a bit more that I read on the internet or in some articles. Also the NA2 solution have a long storage life in their diluitions? Because I would like to start to use those solutions because I would like to buy for it powder chemicals.

Best

Stefano Germi
Italy

As Jim wrote keep loger in the refrigirator. The storage time depend on the weather , colder longer.
I rarely keep mine longer than a month most of the time the bottle is already empty.

Na2 keep a log time without any problem. and here I count in years.