Locating method for detecting nonmetallic e.g. plastics bodies such as toys in or on ground surface of field, meadow, wood, beach

摘要

The method involves first spraying the area in question with a chemically active solution, to make the plastic s body to be found surface detectable. It has two steps, physical and chemical. Metal ions in solution are used to react with, activate and sensitize plastics surfaces, thus marking the site. The grass, weeds or bushes are then at least partially removed