Blair Spray Matte Fixative is used to prevent smudging of soft art materials such as charcoal, pastels, and pencils. This low-odor fixative allows you to continue to work on your art as it dries very quickly and has little effect to the color of the surface. The workable finish stops bleeding between layers of tempera, casein, and watercolors. Spray Matte Fixative can also protect blueprints and ozalid reproductions.