Light reflectance value (LRV) of a surface. Method of test Ingestion-build-51215 Face images have been used

Face images have been used for many decades to verify identity of persons

testing frequency

Annex B (normative) Sample size and product sourcing requirements

cementing and cement drying machines

Light reflectance value (LRV) of a surface. Method of test Ingestion-build-51215 Face images have been usedBS 8493 specifies the method of test to determine the Light Reflectance Value (LRV) of different surfaces of materials. LRV is the proportion of visible light reflected by a surface compared to the sensitivity to light of the human eye. BS 8493 applies to: Opaque paint coatings and paint systems, including those that cause extreme angular dependences of reflected light and those that have a surface texture of <2 mm Opaque coverings including those