Crystal Violet product is an aerosol spray used for the visualization of fingerprints on surfaces that have been treated with cyanoacrylates. Crystal Violet is also an excellent stain for visualizing fingerprints on the sticky side of an adhesive tape. Mistral’s easy-to-use aerosol version of the essential Crystal Violet chemical means that there is no messy, time-consuming preparation or mixing of powder/concentrate with water. Just spray, flush with water, and see the results. Once the fingerprints are stained with the Crystal Violet spray, the results can be easily seen and photographed.