I founded others chemicals yesterday in this old darkroom. Some of them are still in the producer plastic can. Most of them are sodiium derivate (sulfite, carbonate, citrate...) there is some silver nitrate and ferric oxalate and metol.
They seems well conserved, today I will mix some simple formulas to test these old powders, hope some of them will work. I'm quite happy because the owner of the flat is going to throw away everything. He is not involved in photography and the darkroom is gone more than twenty years ago.
Thanks to Tom for share his experiences.