Each glass bead works as follows: An incoming light beam refracts as it passes through the front surface of the glass bead and is reflected off the mirrored surface behind the bead again. The beam then passes back through the front surface and returns toward the light source.
Cube corners are retro-reflective lens elements like glass beads. Each cube corner has three mutually perpendicular refractive surfaces.
An incidental light ray is refracted on each of the three surfaces and is returned to its source parallel to its initial direction. It functions like a ball bouncing into the corner of a room.
ISO 20471/ BIS approved IS 15809:2017 INDIAN STANDARDS FOR HI-VISIBILITY
REFLECTIVE CLOTHING AND WORK WEAR
Permits full and undivided attention to approaching traffic
Provides ample separation of the worker from conflicting vehicle traffic
Provides greater visibility in inclement weather conditions
Better visibility in case of complex background
Workers are exposed to traffic speeds exceeding 80 km/h
Pedestrian workers and vehicle operators have high risk loads placing the Pedestrian worker in danger
USER GUIDELINES OF HI-VISIBLE JACKETS AS PER INDIAN & INTERNATIONAL STANDARDS
There are 3 discrete levels of risks areas as per ISO 20471 standards for high visibility warning clothing. In accordance, there are 3 different types of high visibility warning clothing that can be used.
Government of India has issued Quality Control Order (QCO) on protective workwear like reflective safety jackets and Fire Retardant Garment to stipulate conformity of these products to Indian Standards.
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