[Mr Man]

Sodium polysulfide is not a definite substance but rather a mixture of sulfides, Na₂S_n where n = 1 to 5. It can be prepared by dissolving sulfur in a sodium sulfide solution. This must be done slowly and carefully since the reaction is exothermic.

Hi Gerald, thanks for that.
I thought sodium polysulfide was probably a bit of a messy concoction as is potasium polysulfide. I didn't know sodium polysulfide could be made by your method of dissolving sulfur in a sodium sulfide solution, which sounds less bother than the sodium hydroxide method, do you have any proportions or quantitys for that as I have some sodium sulfide and can easily get hold of some sulfur