SpectraFix 12 oz. Pastel Fixative Spray
SpectraFix blends art-grade milk casein with water and pure grain alcohol plus a small amount of isopropyl alcohol. The alcohol evaporates rapidly taking the water with it, leaving a thin film of casein which quickly dries to a protective matte surface. Even though it is milk protein, it is not subject to invasion by opportunistic organisms, as 9000 years of use as an art medium testifies. SpectraFix is not packaged in a pressurized aerosol can because the necessary propellant required to eject the fixative may cause unforseeable effects to the pastels. SpectraFix instead uses a Fine Mist Finger Sprayer, producing a vaporous mist through finger action alone.