Collaboration with Evaporation

water glasses, pigment residue, lightbox, shelf, 3”x3”x4”, ongoing
The same water glass is used to rinse my brush when doing ink drawings (a common form of sketching for me). A ring of color graphs the amount of time that passes (the amount of water that evaporates) since the last time a brush was rinsed. The glass is complete when all of the water has evaporated.