A rich array of Blues and greens can also be found in Golden Open acrylics. If you are a Plein Air painter and are frustrated with your acrylics drying too fast or do not want to work with solvents. Give Golden Open Acryiics a try. You will love the extended open time and the lush pure pigments in Golden paints.OPEN Slow-Drying Acrylics are formulated with 100% acrylic polymer dispersion. OPENs feel and optimal working time is the result of a unique synergy between its binder, humectants, and pigment load.