| 1.
Photometric – Coefficients of retro reflectance.
(While typical values are much higher, the following
are the minimum values.)
Table 1 Minimum values (candelas/foot candles/sq. ft.)
Entrance
Angle Observation
Angle Silver Yellow Orange Red Green Blue Brown
.02 -4 250 170 100 45 45 20 12
.02 +30 150 100 60 25 25 11 8.5
.05 -4 95 62 30 15 15 7.5 5.0
.05 +30 65 45 25 10 10 5.0 3.5
After accelerated aging 1000 hrs
a minimum 65% of values in Table 1 is maintained (Orange
500 hrs.).
2. Color – Measured with Federal
Specification FP – 85. Section 718.01 (a) or ASTM
D4956 or BS 873 Part 6 (Table 1).
Table II CIE Chromaticity Coordinate
Limits
X Y Min Max
Silver .304 .326 27.0
Yellow .508 .482 15.0 40.0
Green .135 .413 3.0 8.0
Red .623 .328 2.5 11.0
Blue .147 .126 1.0 10.0
Brown .135 .430 3.0 9.0
3. Adhesives – Pressure sensitive is the standard
adhesive which conforms to Class 1 requirements and
is designed to high speed production of traffic signs
using mechanical squeeze roll applicators, at temperatures
over 65F (18C) .
4. Gloss – Not less than 50 – ASTM D523
using an 85 gloss meter.
5. Thickness – Not more than .012 inches without
liner.
6. Flexibility – LS – 300C – No evidence
of cracking, peeling or delamination.
7. Shrinkage – not greater than 1/32” in
10 min. nor 1/8” in 24 hrs.
8. Solvent resistance – LS – 300C (3.6.2)
passes all tests.
9. Accelerated aging –
ASTM G23, Type E or E11 1000- Passed 65% + minimum coefficient
of retro reflection. (RA). After 2000 hrs not less than
50% of reflectivity values specified.
10. Tensile Strength – Shall be not less than
10 pounds per inch or width or more than 15
pounds per inch of width.
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