Experiments verify a theory that explains why polymer solutions like paint doesn’t dry any faster on a dry day than on a wet day. Water evaporation drives the polymer molecules toward the surface, where they form a dense layer that hinders evaporation and shields the surface from humidity effects.

Experiments verify a theory that explains why polymer solutions like paint doesn’t dry any faster on a dry day than on a wet day. Water evaporation drives the polymer molecules toward the surface, where they form a dense layer that hinders evaporation and shields the surface from humidity effects.