> Well, as time goes by and I get myself more and more organised...
> Can anybody tell me how long a saturated mix of amonium dichromate, stored
> in a cool dry and dark place, would last? My mix has sat unused for about a
> year (!), and I don't know if it will still be good, or what problems i may
> encounter and what solutions I may need to resort to. At least I have a huge
> list of suppliers (in canada and out :)) !
My tests show it lasts (assuming closed dark glass container) but will be
slower, so you may need to add 20 to 40% exposure. Test.