Quote Originally Posted by Athiril View Post


Hypo is just metabisulphite or sulphite in water (usually the latter, sometimes both).


If you cant get thiosulphate, and want it for something other than a fixer (so cheap thiosulphate fixer is no go) then you can heat sodium sulphite + sulphur in water to make it.
Wrong!

Sorry. Don't try to fix film or paper with the former!

The latter synthesis is correct, but rather messy. You can get colloidal sulfur.

PE