The MM1 Drying Retarder will slow the evaporation of water from the paint. However, excess amounts of MM1 Drying Retarder (over 10%) will severely slow "cross linking" of the acrylic. Therefore, even though the paint may look dry (and indeed all the water will have gone from the paint), it will not have "cross linked" or "cured" so it is able to be re-wet, i.e. with a wet brush or cloth. This allows the Matisse acrylic colours to be used just like watercolours.
Available in 250ml jars.
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