HP - Hewlett Packard Photosmart 6520 e All-in-One (364 / SD 534 EE) - Original - Ink Cartridge Multipack (black, cyan, magenta, yellow) (Electronics)
The colors are quickly depleted. I do not understand (or just a trick?) Is that there is no view of the ink level in the cartridge. The box is blocked. And the printer can be seen, although the colors, but the filling of black can not be determined b
