Liquitex Ultra Matte Fluid Medium
What it does Dramatically reduces surface gloss to give a dead matte finish with no sheen Maintains paint opacity, color intensity and hue Economically extends opaque color to double amounts without affecting color or acrylic stability - perfect when underpainting or running out of color mid way through  Slows drying time to help you create more subtle color blends Lowers the viscosity of heavier body paints Maintains paint adhesion, durability and archival quality Makes a weak tinting white when you add over 50% of the medium, increasing the value of your original color by one level How to use it Fully intermixable with all Liquitex products The matte effect is most obvious when mixed with opaque colors Can be thinned by diluting with up to 25% water - distilled water will give best results Mix as much as you like into acrylic color to create the viscosity and transparency you want - the more you add, the thinner and more transparent your color will become St