Retarder is an additive used to increase the open (drying) time of acrylic paints. Useful for wet in wet techniques and reducing skinning on the palette. (Item# 3580)
OPEN Thinner contains no binders and is used to thin paint mixes without altering open time, or to maintain and adjust workability on palettes without water mists and moisturizing palettes. (Item# 3595)
Neither Retarder nor OPEN thinner contain binding agents. To ensure adhesion, it is recommended that the addition of Retarder not exceed 15% (1:6), and OPEN Thinner should not exceed 25% (1:3) when mixed with colors or mediums.
Acrylic Flow Release is an additive used to reduce surface tension of the water in the acrylic emulsion, thereby increasing the slickness and flow of the paint. It is effective for achieving rich stains on a porous surface.