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Examination of Uneven Reflective Sheeting

Fix the reflective sheeting at least 3m in the platform in the black open environment during the nighttime, place it away from 10 meters vertically, and take the distance light of the headlight for automobile as the light source to irradiate the reflective sheeting vertically, and it will be taken as the uneven retro-reflectivity if you can identify obvious difference of the retro-reflectivity in different areas of the reflective sheeting by visual examination.