Emerald green’s photooxidation from As 3+ to As 5+ is well known and has been previously reported in the literature, Monico says, but the effect of humidity on the pigment was less understood. What’s ...

Oil-based paint offers a beautiful finish, so keep the walls pristine by cleaning them with a few simple, gentle staples you already have at home.

Around 2014, in his apartment in Harlem, a former real estate agent named Jeffrey Ventura Morell installed a large portrait of an 18th-century gentleman in his kitchen — right above his dishwasher, ...