Document ID: chunk:federal_register_of_legislation:F2015C00542:reg:1:p33
Version: federal_register_of_legislation:F2015C00542
Segment Type: reg
Provision Reference: reg 1 (pt 33/43)
Character Range: 232414–235595

6.2.1.1. Other methods giving equivalent results shall be allowed.

              6.2.2. Number of test pieces

               Three flat test pieces 130 mm x 40 mm cut from a flat sheet sample shall be subjected to testing.

              6.2.3. Interpretation of results

              6.2.3.1. The resistance to the simulated weathering shall be considered to have given a satisfactory result if:

              6.2.3.1.1. The light transmittance measured in accordance with Annex 3, paragraph 9.1. does not fall below 95 per cent of the pre-weathering value. Additionally, for windows which are required for driver visibility the value shall not fall below 70 per cent.

              6.2.3.1.2. No bubbles or other visible decompositions, discolorations, milkiness or crazing shall occur during weathering.

              6.2.4. A set of test pieces submitted for approval shall be considered satisfactory from the point of view of the resistance to simulated weathering if one of the following conditions is met:

              6.2.4.1. All test pieces have given a satisfactory result.

              6.2.4.2. One test piece having given an unsatisfactory result, a further series of tests carried out on a new set of test pieces or samples gives satisfactory results.

              6.3. Cross-cut test

              6.3.1. Indices of difficulty and test method

               The requirements of Annex 3, paragraph 13., shall apply only to coated rigid products.

              6.3.2. The cross-cut test shall be carried out on one of the test pieces from paragraph 6.2.

              6.3.3. Interpretation of results

              6.3.3.1 The cross-cut test shall be considered to have given a satisfactory result if:

              6.3.3.1.1. The cross-cut value Gt1 is met.

              6.3.3.2. The test piece shall be considered satisfactory from the point of view of approval if one of the following conditions is met:

              6.3.3.2.1. The test has given satisfactory results.

              6.3.3.2.2. The test having given an unsatisfactory result, a further test carried out on another remaining test piece of the test from paragraph 6.2 gives satisfactory results.

              6.4. Resistance-to-humidity test

              6.4.1. Indices of difficulty and test method

               The requirements of Annex 3, paragraph 7., shall apply.

              6.4.2. Ten flat square test pieces of 300 mm side shall be subjected to testing.

              6.4.3. Interpretation of results

              6.4.3.1 The humidity test shall be considered to have given a satisfactory result if:

              6.4.3.1.1. No visible decompositions like bubbles or milkiness occur on any sample,

              6.4.3.1.2 And if the light transmittance measured according to Annex 3, paragraph 9.1. does not fall to less than 95 per cent of the pre-test value and additionally to no less than 70 per cent for any window required for driver visibility.

              6.4.4. After testing the test pieces shall be stored for at least 48 hours at a temperature of 23 °C ± 2 °C and a relative humidity of 50 ± 5 per cent, and then subjected to the 227 g ball