"Pressed powder is so heavy and dry," he says. "Anything heavy and dry is a recipe for disaster when it comes to your skin. It’s going to weigh your skin down. It doesn’t matter if you’re eight. You look like you’re 88."
Because it’s so heavy and has a higher chance of oxidizing, it also has the potential to settle into any sort of crease and create deep lines that just aren’t there.
While Sir John says he actually doesn’t believe in baking at all (he doesn’t like applying that much powder on anyone), if you do want to set your concealer with powder, he says to only use loose powder. You just need to make sure it’s light enough, and for that, he has a test.
"Take the loose powder and blow it, if the particles go up into the air, it’s OK for the ocular area," he says. "If they drop immediately, it’s too heavy and you don’t want to use it."
You'll also want to be sure to apply it with a brush, and not with a puff, to avoid applying too much powder.
This article originally appeared on InStyle U.S.