Document ID: chunk:federal_register_of_legislation:F2023C00153:front:0:p21
Version: federal_register_of_legislation:F2023C00153
Segment Type: other
Provision Reference: 
Character Range: 57864–61168

tape, which shall be at least 25 mm wide, shall be pressed for at least five minutes to the surface prepared as prescribed in paragraph 2.5.1.
Then the end of the adhesive tape shall be loaded in such a way that the force of adhesion to the surface considered is balanced by a force perpendicular to that surface. At this stage, the tape shall be torn off at a constant speed of 1.5 m/s +/- 0.2 m/s.
2.5.3.                              Results
There shall be no appreciable impairment of the gridded area. Impairments at the intersections between squares or at the edges of the cuts shall be permitted, provided that the impaired area does not exceed 15 % of the gridded surface.
2.6.                                    Tests of the complete lamp incorporating a lens of plastic material
2.6.1.                              Resistance to mechanical deterioration of the lens surface

2.6.1.1.                        Tests
The lens of lamp sample No. 1 shall be subjected to the test described in paragraph 2.4.1 above.
2.6.1.2.                        Results
After the test, the results of photometric measurements carried out on the lamp in accordance with this Regulation shall not exceed by more than 30 % the maximum values prescribed at point B 50 and not be more than 10 % below the minimum values prescribed at point 50 V.
2.6.2.                              Test of adherence of coatings, if any
The lens of lamp sample No. 2 shall be subjected to the test described in paragraph 2.5 above.
3.                                          VERIFICATION OF THE CONFORMITY OF PRODUCTION
3.1.                                    With regard to the materials used for the manufacture of lenses, the lamps of a series shall be recognized as complying with this Regulation if:
3.1.1.                              After the test for resistance to chemical agents and the test for resistance to detergents and hydrocarbons, the outer face of the samples exhibits no cracks, chipping or deformation visible to the naked eye (see paragraphs 2.2.2, 2.3.1 and 2.3.2);
3.1.2.                              After the test described in paragraph 2.6.1.1, the photometric values at the points of measurement considered in paragraph 2.6.1.2 are within the limits prescribed for conformity of production by this Regulation.
3.2.                                    If the test results fail to satisfy the requirements, the tests shall be repeated on another sample of headlamps selected at random.

       Annex 6 - Appendix 1

       CHRONOLOGICAL ORDER OF APPROVAL TESTS

       A. Tests on plastic materials (lenses or samples of material supplied pursuant to paragraph 3.2.4 of this Regulation).

        Samples                           Lenses or samples of material  Lenses
Tests   Limited photometry (para. 2.1.2)  1                              2       3  4  5  6  7  8  9  10  11  12  13
1.1     Temperature change (para. 2.1.1)                                                              x   x   x
1.1.1.  Limited photometry (para. 2.1.2)                                                              x   x   x
1.1.2   Transmission measurement                                                                      x   x   x
1.2.1   Diffusion measurement             x                              x       x  x  x