Ninhydrin Pump Spray, Methanol-Based, 8 oz Ninhydrin is one the best processes available to develop latent prints on paper evidence, such as bad checks, hold-up notes and threatening letters. To avoid the use of aerosol sprays which may not saturate the paper as well, here is an alternative. This formulation of Ninhydrin will not run most inks. With this bottle, you have the option of unscrewing the lid, pouring the solution into a tray and dipping paper evidence for maximum saturation and superior development of latent prints. This solution is hazardous and must be sprayed in a fume hood and stored inside a flammable liquids cabinet. This pre-mixed Ninhydrin solution comes in a convenient pump spray bottle. The methanol-based mixture requires an additional surcharge to ship by air. •Formulations will not run most inks •Comes in a convenient pump •Solution has a shelf life of six months