Acrylics are often preferred because they dry faster on canvas than oil paints due to their polymer base. (I use a blow-dryer to speed up the drying process) Unfortunately, this also affects the time acrylics stay moist. A trick to keep paints from drying out is to spray a light mist of water over them occasionally.
Moisture-retaining palettes also increase acrylic paint drying time, and can be substituted with a shallow container, a sheet of grease proof paper, and piece of wet watercolor paper.
Moisture-retaining palettes also increase acrylic paint drying time, and can be substituted with a shallow container, a sheet of grease proof paper, and piece of wet watercolor paper.