I bought the cartridges already October 2013. Delivery was also from the same supplier, but the cartridges were changed. While cartridges were gray in 2013, and worked super, the cartridges from the delivery from October 2014 are now black and on the board a piece was saved. I do not know if that's the problem, but the new cartridges are not recognized by my printer. There always comes the message printer error. The supplier is very accommodating and would refund the amount after a conversation. Too bad that the cartridges are different now. At that time, they were absolutely unbeatable for the price.
