If we had a magic wand, using it to make enlarged pores disappear would be at the top of our to-do list. When we’re trying to create a smooth, flawless canvas for our makeup, those tiny craters can really get in the way. We may have yet to acquire those special powers, but at least we have pore-blurring products, which are their own sort of magic. Typically in primer form, these products seemingly erase pores in seconds. But how do they work and do the results last? We asked Roselin Rosario, L’Oréal associate principal chemist, to find out.