SpectraFix is a casein-based pastel fixative that utilizes milk protein and grain alcohol to provide a non-toxic, fully archival fixative for pastel, charcoal, conte, watercolor, gouache and multi-media techniques. It holds and protects media without darkening or dulling colors. It can also be used under oil paintings to hold a preliminary charcoal or pencil sketching and provide a barrier between the oil paint and the drawing. It is all natural, odor-free and can be sprayed indoors without obnoxious odors or unhealthy fumes.It is available in a 12 oz. non-aerosol pump fine mist plastic spray bottle. SpectraFix concentrate is available by special order in a 2 oz. bottle, and is reconstituted with alcohol such as Everclear or quality vodka. Rubbing alcoholcanalso be used, but due to its processing with strong sulfuric acid instead of simple distillation, it is less healthy to breathe and is therefore not recommended.