Hi Mr Man,
Originally Posted by Mr Man
Just to clarify, my info came from a 1961 Dictionary of Photography (Iliffe Books, London; A.L.M. Sowerby, (ed.)); I just looked up 'Liver of Sulphur' - which says ' see Potassium Sulphide'. The entry says it's a substance of variable composition, but mainly potassium trisulphide, and potassium thiosulphate. Wikipedia says liver of sulphur is a variable mixture of "a poorly defined mixture of potassium sulfide, potassium polysulfide, potassium thiosulfate, and probably potassium bisulfide."
Anyway, I hope your toner goes well. :-)