Jo Sonja's Retarder Medium 250ml Size:250ml Matisse Inks is best shaken

Matisse Inks is best shaken before use to ensure that the binder separates from the fine pigment particles over the time

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assembling required

Jo Sonja's Retarder Medium 250ml Size:250ml Matisse Inks is best shakenAll Jo Sonja Mediums Jo Sonja Iridescent 60ml Jo Sonja Acrylic 75ml Jo Sonja Acrylic 250ml Jo Sonja Acrylic 1Liter Jo Sonja Acrylic Sets Jo Sonja's Retarder Medium is an additive used to extend the "open" or drying time of Jo Sonja's Colours and Mediums. Acrylic paints dry rapidly in conditions of low humidity and or high temperature. Both air conditioning and winter heating reduce the levels of humidity in a room causing acrylic paints to dry faster.