The way I understand, the latest trend is for waterproof and sweat-proof make up. It suppose to last through all kind of daily activities, together with vigorous exercises and with swimming.
So pressed powder needs to be water repelant and have extremely good skin adhesion.
How do you mean, that I could “treat the powders myself”?
Also, I was wondering, that maybe it would help to incorporate some volatile silicones and than “baked”?
Any other ideas?