what the purpose of sensitizer?i buy socomask emulsion 900gm violet color and it came along with bottle of liquid kinda like bottle for cough medicine u got from goverment clinic..its around 40 ml. i forgot to ask what it is but i think its the sensitizer..rite?? after googling around i think its use to increase the emulsion sensitivity to light..correct me if im wrong..so how much to i need to mix??what the correct ratio..