I can advise these individual cartridges. Indeed, cyan and magenta are found to be defective in my case. The bag packing the already contained a lot of toner overflowed. When using these two cartouchent literally emptied into the printer. When the little roller rotates large amounts of toner out, overflowing on other cartridges. In short, I was good for everything clean and replace the old ones. Yellow and black do not have this problem. Produced twice cheaper but because of only two cartridges that work is anything but a bargain. So back to the original cartridges ...
