What is ISO 7591:1982 for
ISO 7591-1982 is an international standard of the specification to retro-reflective registration plates for motor vehicles and trailers. For this testing, the performance in specific temperature with different hours is an important factor for evaluation.
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The main testing specifications
Reflection value (cd/lux/sq.):
| Color | Observation angle | Entrance angle | |||
| 5° | 30° | 40° | Maximum | ||
| White | 0°12′ 0°20′ 1°30′ |
45 30 3.5 |
18 12 2 |
8 6 0.7 |
250 |
| Yellow | 0°12′ 0°20′ 1°30′ |
30 20 2.3 |
12 8 0.8 |
5 4 0.4 |
250 |
Colorimetric properties by day and night: illuminated with the CIE Standard Illuminate D65, at 45° to the
Size: 520mm*114mm*1mm thick (for Europe), 305 mm x 152 mm x 1 mm thick (for the US) and could prepare other sizes for target market in different countries.
Normal and viewed along the normal (45/0 geometry) and should be as the data table listed.
Durability: reflection value and luminance factor should be not less than 50% and 80% of the requirements separately after testing.
Temperature resistance and adhesive to the substrate: testing in specific temperature and hours, there will be no cracking or peeling off situation.
Corrosion series testing: impact resistance, bending resistance, water resistance, resistant to fuel, cleanability, and resistant to saline mist included. The plate with the film should have no corrosion or obvious visible change that would reduce its efficiency after testing.
Testing preparation
Quantity: Should prepare 9 pieces plate and each plate aims for one clause testing.
Design: One sample plate is a completely finished plate, seven sample plates with only 1 letter and two numerals, and one sample plate with no embossing at all. Besides, the finished plate should be made by the competent authorities.
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