1.2l water 240ml sodium sulfate 60ml sodium chloride 20ml xantham gum(optional for increased efficacy)

Boil water, stir until fully dissolved, a small amount of solute should remain, if not, increase sodium sulfate slowly until it does, indicating no free water molecules available for dissolution.

Solution should now be cooled to below 18c( freezing point) for an end product that will regulate temperature to 18c.