- You bought a shade that's too dark for your skintone and can't return it.
- You want to transition your foundation from summer to winter.
- You have pale skin and you can't find a light enough shade.
Having pale skin, this is a trick I've used with several foundations. My white foundation of choice is Illamasqua's Rich Liquid Foundation, which I would recommend because of how much pigment it has. You need a tiny little drop, and its texture is on the liquid/runny side, making it easy to mix.
To mix my white foundation in with my usual one, I simply use a clean small brush or a toothpick (if I only need a very small drop, a toothpick is a great tool for this!) to scoop a bit out, and use the back of my hand to mix the two foudations. Quick and easy!