I have noticed a huge improvement in the appearance of solid blacks printed with the new Enhanced matte 'improved black quality' paper. Solid areas of black on the old enhanced matte paper show what i can only describe as a 'mottled-black' appearance. Areas of full solid black on the old paper has lots of very small slightly 'shiny black' patches in amongst more 'velvety flat black' areas giving solid black on the old paper a mottled appearance. The new paper shows none of this. It's prints a velvety smooth black all the way down to full black.