Abstract: A wet palette for water-based paint that includes a flat container having a peripheral rim and which, in its operational state, contains water. A retaining structure for the water, preferably a sponge or a foam, is placed in the flat container and arranged to become impregnated and moisten by contact and absorption of the water contained in the flat container. A sheet of paper permeable to the water is positioned on the retaining structure, and, in its operational state, is in contact with water-based paint applied to an upper side of the sheet of paper. The sheet of paper is a sheet of one-side coated (C1S) paper, which is wet-strengthened (REH), namely a sheet of machine-finished coated (MFC) paper or a sheet of cast-coated paper, the coated upper side of which is exploited, in its operational state, as a support for the application of the water-based paint.