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.
My cartridges go dry on average about every six months regardless of how much I use it. I have tried the cheapest and the best and there is no difference. The price that they charge for the ink, I do not know why they do not give the printers away. My present print has 1 black and 3 color. I never use color, but after using 2 black it quit printing because it was out of color.