The Martin/F.Weber Co. offers an extended range of superior mediums for use with acrylic colors. All Prima Acrylic Mediums, like Prima Acrylic colors, have been reviewed by an independent toxicologist and carry the AP seal of Art & Creative Materials Institute. They are therefore categorized as nontoxic. Complete, detailed usage instructions are supplied on each medium container label.

Two consistencies of Prima Acrylic Mediums are available for the artist: Gel Mediums and Liquid Mediums.

Prima Gel Mediums are full-bodied mediums, similar in the consistency to that of tube acrylics. When mixed with colors, the Gel Mediums will support the structural body of tube acrylic colors.

EXTENDER GELS: GLOSS, SEMI-GLOSS AND MATTE, will increase transparency, extend color and alter the body of acrylic tube colors. Each will enhance brush characteristics, hold moderate impasto texture and improve film durability. When mixed with the Extender Gels, colors will dry in the same amount of time as acrylic paint directly from the tube. If a longer drying is desired, Prima Retarder Gel may be added.

Gloss Extender Gel will dry to a gloss finish.

Semi-Gloss Extender Gel will dry to a medium sheen finish.

Matte Extender Gel will dry to a non-reflective luster.

RETARDER GEL will prolong the drying time in proportion to the amount added to acrylic paints and will also enhance brush characteristics.

MODELING PASTE is a firm bodied, paste-like acrylic compound, which can be molded or textured when wet and carved when dry. It can be applied to surface with palette knife, brush or fingers. It dries to a hard, but flexible mass. It may be used under paint, mixed with paint or over paint.

PUMICE STONE COARSE is used to create a gritty surface texture which dries hard yet flexible. It can be applied under paint or mixed with paint, and can be mixed with other Prima Gel Mediums to create various effects. Apply with a palette knife or painting tool of your choice to almost any primed surface.