BLACK LIGHT Main function: identify the world notes true and ... BLACK LIGHTDetector portable hand-held lights here, put 4W UV lamp, electric lighting in the top with beads. To ... absorption of paper currency, no reflected light; counterfeit Qingbaikouan paper has a strong reflected light. 3, counterfeit money or logo ... negative on the 5th, in the case of light the dark, that is, replace the battery ...