Turmeric stains skin. Period. If you are fair, it can last for days. In India where a haldi mask is applied to arms/legs before weddings it gives a golden glow. Here in the US, when I do it it turns this pasty-pale chick yellow for days if applied straight. If I dilute a 1/4 tsp or so with besan and yogurt as a mask it will come off with enough scrubbing and not stain very deeply. But make no mistake, it stains. And the more of it you use, and the less it is diluted with other ingredients the harder it is to get off. Not a bad thing, but do be warned.