The specific CMC Magnetics DVD+RW disc has the PHILIPS 041 ID code, manufactured by CMC Magnetics and its certified speed is 4X. It was burned at this speed.
After the first burning, the writing quality was good with PIE error levels below the limit of 280 and the CDSpeed graph smooth. The writng quality once again becomes even better after the first couple of burns. Finally, after 100 burns the disc continues to produce low PIE error levels and its readability at 16X was excellent.