Quote:
|
Originally Posted by George Holmes
. . . try copal medium, . . . Grumbacher; Speeds drying, but not as fast as Liquin.
|
Last time I examined a bottle of Grumbacher "copal medium", alkyd resin was the active ingredient.
No copal was harmed in the making of this product.
Liquin and other alkyd preparations do hasten the drying rate of oil paint. Delamination can be a consequence of using alkyd mediums in layered techniques, however.
Opting for resin mediums (copals, balsams, damar, mastic etc.) the unique handling character imparted to paint by each of these is more of a consideration than drying time alone.