Coefficient of Retroreflection
Measurements are made in accordance with ASTM E-810 "Standard Test Method for Coefficient of
Retroreflective Sheeting" in terms of candlepower per foot-candle per square foot (cd/lux/m 2 ).
Table A. Typical Coefficient of Retroreflection (R A ) for New Sheeting (cd/lux/m 2 ).
Observation Angle 1
0.2?
0.5?
Entrance Angle 2
983 Typical Values White
(FMVSS 108 Requirement)
983 Typical Values Red
(FMVSS 108 Requirement)
-4?
800
(250)
160
(60)
30?
550
(250)
110
(60)
45?
345
(60)
60
(15)
-4?
460
(65)
95
(10)
30?
215
(65)
40
(10)
45?
85
(15)
16
(4)
983 Typical Values
Yellow
645
420
235
360
180
65
1
Observation Angle - the angle formed by the light beam striking the reflective surface and the light beam returning to the
observer (from 800 feet, a motorist normally views a marking at approximately an 0.2? observation angle).
2
Entrance Angle - the angle formed by a light beam striking a surface at a point and a line perpendicular to the surface at the
same point.
Typical Physical Properties
The following technical information should be considered typical only and should not be used for specification
purposes.
Property
FMVSS 108 Requirement
Series 983 Typical Value
Thickness (Caliper) No requirement
Whiteness
Reflective Limit Y > 15 White
ASTM E1164 > 2.5 Red
Gloss No requirement
ASTM D523 @ 85?
Dimensional Stability < 1/8 inch change on
ASTM D4956 9 x 9 inch panel
Flexibility - wrap around No cracking
0.125 inch mandrel @ 32?F (0?C)
High pressure wash test No requirement
45? angle, 1200 psi, 8 inch away
Adhesion
90? Hanging Weight < 2 inch (55mm) movement
ASTM D4956
Minimum Application Temp.
Instron Peel Adhesion
0.014 inch - 0.018 inch
45 White
5 Red
100
No measurable change
No cracking
Passes
0.2 inch (4 mm)
60?F (15?C)
12 inch/minute, 90? pullback No requirement
2
Degreased aluminum
Prepainted panel
Stainless steel
FRP
Tedlar?
Aluminum Rail
5.3 lb/in (.95 kg/cm)
3.0 lb/in (0.55 kg/cm)
6.0 lb/in (1.1 kg/cm)
2.5 lb/in (0.52 kg/cm)
3.0 lb/in (0.54 kg/cm)
3.5 lb/in (0.56 kg/cm)
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