This standard specifies the technical requirements for indentation electrostatic display instruments used in the field of forensic science, including the main performance of the product, inspection methods, inspection rules, marking, packaging, transportation, storage, etc. This standard applies to display instruments that use electrostatic principles to display indentations on paper and use powder spraying as the main method (hereinafter referred to as products).
GA/T 822-2009 history
2009GA/T 822-2009 Indented marks electrostatic developing apparatus technical requirement