Check washing process of washing a check is relatively simple and can be accomplished with basic solvents. The actual solvent is largely irrelevant — more importantly, the polarity of the solvent must match the polarity of the dye in the ink. For example, an ink that is mostly made of a polar dye would require a polar solvent (e.g. acetone or isopropanol). Both nail polish remover (acetone) and rubbing alcohol (isopropanol) are able to pull most common inks away from paper in minutes. Similarly, a non-polar dye would require a non-polar solvent (e.g. toluene or a similar hydrocarbon). Check washing Check washing
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