Document ID: chunk:federal_register_of_legislation:F2023C00158:front:0:p18
Version: federal_register_of_legislation:F2023C00158
Segment Type: other
Provision Reference: 
Character Range: 47242–50138

4. RESISTANCE TO LUBRICATING OILS

       The outer surface of the retro-reflecting device and, in particular, the illuminating surface, shall be lightly wiped with a cotton cloth soaked in a detergent lubricating oil. After about 5 minutes, the surface shall be cleaned.  The CIL shall then measured (annex 4, paragraph 3.2. or annex 14, paragraph 4.2.).

       5. RESISTANCE OF THE ACCESSIBLE REAR FACE OF MIRROR-BACKED RETRO-REFLECTING DEVICES

       5.1. After having brushed the rear face of the retro-reflecting device with a hard nylon brush, a cotton cloth soaked in the mixture, defined in paragraph 3 shall be applied to the said rear face for one minute.  The cotton cloth is then removed and the retro-reflecting device left to dry.

       5.2. As soon as evaporation is completed, an abrasion test shall be made by brushing the rear face with the same nylon brush as before.

       5.3. The CIL shall then be measured (annex 4, paragraph 3.2. or annex 14, paragraph 4.2.), after the whole surface of the mirror-backed rear face has been covered with Indian ink.

Annex 9

STABILITY IN TIME OF THE OPTICAL PROPERTIES [1/]

OF RETRO-REFLECTING DEVICES

       1. The authority which granted approval shall have the right to check the stability in time of the optical properties of a type of retro-reflecting device in service.

       2. The competent authorities of countries other than the country in which approval was granted may carry out similar checks in their territory. If a type of retroreflector in use exhibits a systematic defect, the said authorities shall transmit any components removed for examination to the authority which granted approval, with a request for its opinion.

       3. In the absence of other criteria, the concept of "systematic defect" of a type of retroreflector in use shall be interpreted in conformity with the intention of paragraph 6.1. of this Regulation.

       Annex 10

       RESISTANCE TO HEAT

       1. The retro-reflecting device shall be kept for 48 consecutive hours in a dry atmosphere at a temperature of 65 +/- 2 degrees C.

       2. After this test, no cracking or appreciable distortion of the retro-reflecting device and, in particular, of its optical component must be visible.

       Annex 11

       COLOUR-FASTNESS [1/]

       1. The authority which granted approval shall have the right to check the colour-fastness of a type of retro-reflecting device in service.

       2. The competent authorities of countries other than country in which approval was granted may carry out similar checks in their territory.  If a type of retroreflector in use exhibits a systematic defect, the said authorities shall transmit any components removed for examination to the authority which granted approval, with a request for its opinion.

       3. In the absence of other criteria, the concept "systematic defect" of a type