Stain removal are capable of removing: Household bleach generally removes a stain's colour, without dissolving the stain itself. Hydrogen peroxide is also a bleaching agent that can be used to treat stains. Sodium hydrosulphite and sodium hypochlorite normally used for removing stain and dyes colors. Acetone is good for removing some glues, nail polish, ink stains, rubber cement, and grease. Nail polish remover may contain acetone, however for general use it is best to obtain bottled acetone from a hardware store. It can be diluted with water. Inert solvents are those that do not react with anything in the stain. Water for
Science of smells smells left by a criminal on a crime scene can be stocked in glassy jars for identification for purposes. The dog's olfaction, as criminalistics technology, developed thanks to works of a Hungarian doctor in 1970s in countries of Eastern Europe during Cold War, notably to identify dissidents. Science of smells The odorology or science of smells is a technology used mainly in criminology for judicial identification. The technology is based on the analysis of smells by dogs notably to merge the criminals or to identify the smell of objects (explosives, drugs). Olfaction of dogs is used for a long time