Wet palette for water-based paint including: - 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, which retaining structure 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 ; and - a sheet of paper permeable to the water , positioned on said retaining structure , and which, in its operational state, is in contact with water-based paint applied to an upper side of the sheet of paper , characterized in that the sheet of paper is a sheet of one-side coated (C1S) paper, which is wet-strengthened (REH), the coated upper side of which is exploited, in its operational state, as a support for the application of the water-based paint , the sheet of one-side coated (C1S) paper being a sheet of machine-finished coated (MFC) paper or a sheet of cast-coated paper, and in that the sheet of one-side coated (C1S) paper has a COBB60 absorption index measured according to ISO standard 535 on the side of its lower side which is between 10 g/m 2 and 25 g/m 2 , as well as a dry tensile strength measured according to ISO standard 1924-2 which is between 50 N/15 mm and 100 N/15 mm. - 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, which retaining structure 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 ; and - a sheet of paper permeable to the water , positioned on said retaining structure , and which, in its operational state, is in contact with water-based paint applied to an upper side of the sheet of paper , characterized in that the sheet of paper is a sheet of one-side coated (C1S) paper, which is wet-strengthened (REH), the coated upper side of which is exploited, in its operational state, as a support for the application of the water-based paint , the sheet of one-side coated (C1S) paper being a sheet of machine-finished coated (MFC) paper or a sheet of cast-coated paper, and in that the sheet of one-side coated (C1S) paper has a COBB60 absorption index measured according to ISO standard 535 on the side of its lower side which is between 10 g/m 2 and 25 g/m 2 , as well as a dry tensile strength measured according to ISO standard 1924-2 which is between 50 N/15 mm and 100 N/15 mm. characterized in that the sheet of paper is a sheet of one-side coated (C1S) paper, which is wet-strengthened (REH), the coated upper side of which is exploited, in its operational state, as a support for the application of the water-based paint , the sheet of one-side coated (C1S) paper being a sheet of machine-finished coated (MFC) paper or a sheet of cast-coated paper, and in that the sheet of one-side coated (C1S) paper has a COBB60 absorption index measured according to ISO standard 535 on the side of its lower side which is between 10 g/m 2 and 25 g/m 2 , as well as a dry tensile strength measured according to ISO standard 1924-2 which is between 50 N/15 mm and 100 N/15 mm. <EOS>