Petticoat Pink is supposedly a sheer color, but it's quite intensely pigmented. I use only a dab is enough to get a healthy glow in a natural looking pink . You can apply as much or as little as suits you and blend it either with your finger or with a synthetic brush (I like the angled brush from Alison Raffaele). I like that Color Design is a no-shimmer formula and it doesn't shine. The staying power is definitely superior to the old mousse formula and is comparable to a traditional powder blush. I use it over my foundation and under a finishing powder, so it lasts all day long, though I do see some fading- it becomes less pink as the hours go by.
Lancome Color Design Cream Blush ($27) is available from every department store. I don't see Petticoat Pink on the company's website so it might be phased out, but Neiman Marcus lists it online and it's available from many counters.
All photos by me.