Holbein Acryla Gouache moves, reacts, blends and feels like traditional gum arabic gouache. Holbein Acryla Gouache is water resistant once dry. Drying to a velvet matte finish; Holbein Acryla Gouache does not shift in color tone from liquid to dry color. What you see wet is what you get once dry. Holbein Acryla Gouache does not have the same fragile surface as traditional gouache in gum arabic and is compatible with all other water soluble media regardless of origin.