Plain hypo (Sodiumthiosulfate) - it is ok for films?

[darkosaric]

Hi,

I have 2x25 gr Sodiumthiosulfate that I don't need from Farmers reducer that I got - and would like to ship this (shipping liquid abroad is problematic).

Can this be used for fixing the films? If yes - how to mix this - in 1 liter, and it is enough for 10 films?

thanks,

 

[Xmas]

See

(there was a url link here which no longer exists)

you need 240 gm per L for conventional concentration it would work with 50 gm but you would need to discard after one or two films.
Buy a large package of hypo.

Noel

 

[darkosaric]

Thanks Xmas .

 

[Xmas]

The safe technique because the fix process for film is

temperature
strength/exhaustion of fix
film type dependent tabular grain takes longer

Is after development to double wash with faucet water ie two lots of water
fix for four minutes and inspect the film in dim light
if it is still milky continue fix and inspect every minute until it stops being milky

then fix for same length of time again

You can fix at 15C but I only use 20C throughout the process.

I then use hypo clear per Kodaks instructions
and
Ilfords archival method to their instructions

I need to do some of this cause I use cheapest film some of time and process in multi tanks and acetic acid stop or temperature shock verboten.

It is gold standard & I use two fix baths for permenance rather than economy.

 

[Gerald C Koch]

While sodium thiosulfate fixer is slower in its action than ammonium thiosulfate it has the advantage that it will not bleach the image as the ammonium salt can. Ammonium chloride can be added to a sodium thiosulfate fixer to decrease the fixing times. There are recipes on APUG.

 

[Ian Grant]

50gm will make very little fixer and postage will be more than it's really worth, you've enough for 200ml or less fixer depending what formula you use.

it lasts indefinitely keep for use in reducers.

Ian