Headform test (para 4)
A debate took place about the number of windscreens to be provided. The Chair explained that the proposed number of 6 windscreens refers to the number originally requested for flat pieces of glass in the regulation. It is difficult to produce flat plastic panes of the dimension requested by the current wording of the regulation; hence the Chair suggested 6 pieces of real windscreens. Purpose of the proposed test is to assess the mechanical strength. Conclusion: proposal for 6 windscreens adopted, with proper justifications. HIC of 1000 was accepted

227 g ball test (paragraph 5)
A debate took place about the procedure.

Concerning the number of samples, the group agreed that at least 8 separate tests must give satisfactory results.

Conclusion:

• 1. the group agreed that the ball drop test should be performed after the humidity test
• 2. and the ball drop test should be also performed on samples with a temperature of – 18° C

Taber test (paragraph 6.1.)
See paragraph 4 above.

Weathering test (paragraph 6.2.)
A debate took place about the intensity of the radiation which could be relevant. It was suggested that the level should not be more than 0.5 Watt/m² with 340 nm wavelength, these figures coming from some experience conducted 10 years ago. However, there is no certainty that all test houses are able to test at these values.

Number of samples: as the test takes about several weeks, it is suggested to provide 3 samples.

The experts informed that they never experienced large variations.

Pass rate: 100% (deletion of paragraph 6.2.4.2.)

Cross-cut test (paragraph 6.3.)
Pass rate: 100% (deletion of paragraph 6.3.3.2.)

Resistance to humidity test (paragraph 6.4.)
It was recalled that this test can make sense in the case of coating and that this test was originally developed for laminated glass where some humidity could “de-laminate” the sample. The experts were all of the opinion that the test is not of high importance. However it was considered so easy to conduct that it makes no pain to keep it.

Fire resistance test (paragraph 6.5.)
The Chair recalled the proposal from CLEPA (document GRSG-100-04) to harmonise the performance requirement (to 90mm/min), and his reluctance at that time (keeping the value of 110 mm/min).

The group was informed that some flexible plastic glazing however can reach a value of about 90mm/min.

Conclusion: proposed value of 110 mm/min to be kept.

The group could not investigate the following tests (i.e. resistance to chemicals and optical qualities) due to lack of time.

This item was not discussed due to lack of time.