Frisket and frisket
When using frisket film or masking tape with acrylics, especially when painting on a textured support like canvas, it is helpful to prime the open area with a thin layer of matte meium after masking. the medium will bleed under the edges of your mask, filling any gaps with clear acrylic that would have otherwise drawn in paint. WARNING: If you brush your medium only along the edge of the mask the stroke will be visible under the overlaying paint. Fill the entire area with medium and allow to dry. Also, a ridge of paint may build up along the edge of the mask, making the paint appear as a decal once the mask is removed. you may try sanding ot planing this edge with a razor if this is undesirable to you
When using liquid frisket, it is vital that it dries completely before applying paint on top of it. Acrylic and liquid latex frisket are both waterborne media and they will mix with each other.
It is equally vital that, when used on paper, that the paper be completely dry before removing the rubber, otherwise the fibers may lift and the surface will be ruined.
Quantum materiae materietur marmota monax si marmota monax materiam possit materiari?