Traditional and Modern Pigments for Contemporary Artists! Tri-Art's Oil Line is part of the Finest Quality Professional family of products. The line is comprised of 71 colours and 24 mediums. Tri-Art selects and formulates unique and exciting ranges of both traditional and cutting-edge colours and mediums for contemporary artists. The colours are formatted to be rich and thick in body. There are unique options as well as the "tried and true." The oil medium family includes traditional, ECO, granular and gels to accommodate any studio or out door environment.