Uniwork Replacement Cartridge Instantly Recognized by an HP Laser Printer. The print quality is the same as the HP OEM cartridge, I see no difference. The cartridge is fully the same as the original, the only difference is that the original cartridge carries the "HP" logo while the Uniwork replacement does not. I bought a twin pack, in the future I will check how many pages the replacement prints compared to the OEM. By shaking the cartridge before inserting it (according to the instructions), the amount of toner in the cartridge appears to be full. Excellent product and value for money. Would I buy again after the second cartridge is empty.