Drying Retarder is a very effective way to slow down the drying time of a chalky paint. Just ONE drop is all you need into 1 spoonful of paint (certainly do not use more than 5%) and mix well into your paint to extend the open working time. eg add paint to gel plate with one drop retailer and mix on the gel plate to extend the open time of the paint. Retarder is very handy if you are in warm environment, or when playing with gel plates.
Easy clean up in warm water. Low or no VOC's. Eco Friendly.