OPEN acrylics remain wet far longer than other acrylics Working time varies according to how thick the material is applied Thin applications tack allowing layers to be applied and blended 2oz BURNT SIENNA Golden Open Acrylics are designed with a unique and relaxed set of working characteristics. Open Acrylics remain wet far longer than other acrylics and resist skinning on the palette during long painting sessions. Golden Open Acrylics facilitate blending, softening, shading, glazing, and fine detail. The unique properties of Open Acrylics allow them to be used with natural fiber brushes and for a range of techniques including portraiture, plein air painting, monoprinting and screenprinting.