PureCircle Ltd. PureCircle Ltd. is a producer of high-purity stevia ingredients to the global food and beverage industry. The company focuses on encouraging healthier diets around the world through the supply of natural ingredients. Its vision to lead the global expansion of stevia as the next mass volume, natural-origin sweetener.
Per HP Manual: The life of the imaging drum depends on the number of black-only or color pages that print. jobs require. An HP color LaserJet 2550 series printer imaging drum could last an average of. 20,000 pages when printing black-only pages and 5,000 pages when printing color pages.
Oh golly, ah, change the drum ! It is the hardware part that the paper wraps around during the fixing process. That is, the ink gets fixed to the paper. After a while the drums develops a large static charge and the plastic coating gets scratches. The result is the finished looks worse and worse. Now the manufacturer does not want it's product mean mouthed. So it hits you up to change the drum so that the finished item always looks pretty.