Amsterdam Auxiliaries Mediums can be mixed with any acrylic colour to vary the effect of your finished piece.
Acrylic Retarder increases the drying time of acrylic paint by a maximum of 20%. It evaporates completely from the acrylic paint when dried.
Use sparingly, the thinned paint may not contain more than 5% Amsterdam acrylic retarder. Can be thinned with water.