Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:7:p11
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 7 (pt 11/12)
Character Range: 620792–623525

shall be cut with a razor blade or a needle into a grid of squares approximately 2 mm x 2 mm.  The pressure on the blade or needle shall be sufficient to cut at least the coating.

       2.5.2. Description of the test

       Use an adhesive tape with a force adhesion of 2 N/(cm of width)  20 per cent measured under the standardized conditions specified in Appendix 4 to this annex.  This adhesive 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 per cent of the gridded surface.

       2.6. Tests of the complete headlamp 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 headlamp in accordance with this Regulation shall not exceed by more than 30 per cent the maximum values prescribed at point HV and not be more than 10 per cent below the minimum values prescribed at point 50 L and 50 R for Class B headlamp, 0.86D/3.5R, 0.86D/3.5L for Class C and D headlamp.

       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 paras. 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