M. Graham Polymer Mediums: M Graham's Matte & Gloss mediums provide ease of use and response to acrylic colours while strengthening the paint film and adding a uniform matte surface, or glossy sheen.
Acrylic Matte Medium: Matte Medium contains environmentally friendly matting agents which create a low sheen effect while enhancing the colour.
Matte Medium is concentrated and increases the adhesion, flexibility and durability of the paint film. It is recommended over water alone (excessive use of water as a diluent decreases the strength of the acrylic film).
To thin acrylic colour, make a mixture of 50% water to medium and add to colour until desired consistency is achieved.