The specific Datawrite DVD+RW disc has the PRODISC W02 ID code and its certified speed is 4X. It was burned at this speed.
The specific media reported excellent writing quality after the first burn which it retains up to at least the tenth burn and beyond. When we reached the fiftieth burn, the writng quality was still good but not as good as the first burns. The PIE error levels, although they were much lower than the 280 limit, are increased in comparison with those of the previous measuremts taken after one, five and ten burnings. However after 100 burns, the disc was still good and playable.