AS NZS 1906.1:2017 pdf free
AS NZS 1906.1:2017 pdf free.Retroreflective materials and devices for road traffic control purposes
Retroreflective sheeting can consist of one of the following:
(a) Very small glass beads enclosed in a thin, transparent, smooth- surfaced plastic matrix,tinted according to the required colour.
(b) Glass beads encapsulated in a series of cells, the upper surface of which is a transparent film, tinted according to the required colour.
(c) Very small cube-corner or prismatic elements moulded into the rear face of a clear flexible sheet, tinted according to the required colour (commonly referred to as ‘micro-prismatic sheeting’).
NOTE: These descriptions are not intended to limit the design or method of manufacture provided that the sheeting conforms with the requirements of this Standard.
The characteristic of a material to absorb energy from daylight in the shorter wavelength regions of the visible spectrum or in the ultra-violet region, or both, and re-radiate some of this energy at longer wavelengths, producing narrow bands of emission in the visible region with enhanced luminance.
NOTE: The phenomenon can considerably increase the luminance factors, and usually also the purities, of orange and yellow. For yellow, luminance factors exceeding unity may be obtained.
The separation of individual layers within a sheeting. This may occur as self-delamination whereby layers have separated by themselves without any mechanical intervention during a test or service life, or which may occur as a weakening of the bond between layers to the extent that relatively large pieces of a layer can be peeled away by hand.
The angle between the axis joining the point of reference (usually the centre) on the retroreflector (i.e. either the device or the sheeting sample) and the observer or receptor, and the axis joining the point of reference on the retroreflector and the illumination source.The angle measured from an arbitrary starting point through which the retroreflective sheeting is rotated during the photometric testing, about an axis normal to, and passing through the centre of, the piece (see Figure Al).AS NZS 1906.1 pdf free download.
