Retro-Reflecting Material

From International Dictionary of Marine Aids to Navigation
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A material which produces reflex reflection (2-1-155) over a wide range of angles of incidence of a light beam, by the use of a large number of very small reflecting and refracting elements, usually very small beads.

The applications are the same as those of retro-reflectors (2-6-270).

(Fig. 7d)

Ch2 Fig7.jpg

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM