its really simple to make just mix the nigari(magnesium chloride) with water ( i used filtered water,distilled or reverse osmosis) until it feels oily,its not an exact Science so if you add to much or too little it wont make a huge difference.good luck
just google- herbalhut nigari
anothe interesting fact about transdermal magnesium chloride therapy is that it naturally raises dhea in you body,no amount of oral magnesium will do that.