What do I use best to put sulphur in suspension for the preparation of a lotion?

Besides suspended sulphur must also be moistened. You can use 0.1% TWEEN 80 for this. As a solvent I recommend 0.8 g bentonite or Veegum combined with 200 mg after CMC mV per 100ml suspension. Both can be mixed with the sulfur and then mixed slowly with freshly boiled hot water.