Drying Retarder is used to delay drying time of Model Color and Model Air Colors, mix a few drops with the color, or dip brush into retarder on the palette.
Colors will not change their consistency.
Useful for "wet on wet" techniques and reducing skin formation on the palette.
Drying Retarder can also be used in very small amounts to thicken Vallejo Model Wash. It will also extend the working time of the wash.