OPEN Acrylics remain wet on the palette for prolonged periods without skinning over and can be blended with most GOLDEN Acrylics, Mediums and Gels, with the open time of the resulting mixtures being proportionately reduced. To maintain the maximum working time of OPEN Acrylics, use OPEN Gel, Medium and Thinner.
OPEN Acrylics lend themselves to both layering and blending in some ways that are reminiscent of oils. Thin applications of OPEN Acrylics can be blended for extended periods, allowing one to develop smooth transitions and to manipulate edges. They can be thinned with either water or OPEN Thinner. When used in conjunction with OPEN Thinner, which is formulated to replenish volatile components and maintain a long working time, OPEN Acrylics can be kept wet and blendable for many hours and even days. OPEN Gel or Medium can also be added at any ratio to help maintain the working time while modifying transparency, sheen, or viscosity.
Over time, thin applications will pass through several stages where the paint will begin to slowly setup and its tack increases. During this time, which can last for many hours, subsequent applications of any OPEN products or water can continue to reopen layers and allow one to continue blending and developing complex passages and fine details.