Photometer for measurement of reflex-relective sign materials.

Author(s)
Rector, H.C. and W.P. Youngblood
Year
Abstract

The need of a reliable and convienent photometer to replace the classic but cumbersome darkroom tunnel method of testing reflex-reflective sign materials has long been desired.The inspection of materials and enforcement of specifications requires a device which can provide fast, accurate and repeatable results in agreement with several established criteria.

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Publication

Library number
A 2560 fo. IRRD 41594
Source

Presented at the 47th Annual Meeting HRB 1968. Ook in HRR nr. 242 pag. 15-21.

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This publication is one of our other publications, and part of our extensive collection of road safety literature, that also includes the SWOV publications.