Matisse Medium Mm1 Retarder 250mL
Use up to 5% Drying Retarder in the colours to slow drying time of paint. Additions of drying retarder may be used in water-colouring, water wash effect, stain painting and hard edge techniques where it assists in pigment wetting, rapid colour diffusion and penetration. An excess of Drying Retarder (more than 8%) may leave paint water sensitive.