2. Problem: Retro-reflective tape does not meet the minimum requirement 330 cd/lux.
Solution: At Portwest, every roll of tape is tested to ensure it meets and exceeds the EN ISO 20471 standard requirements. A retroflectometer is used to measure the coefficient of two rotating angles. EN ISO 20471 states the reading should not be below 330 (cd/lx.m2) however at Portwest we insist on a reading of 400 (cd/lx.m2) plus.