Which cartridge fits the HP Officejet Pro 6230?

Fifteen envelopes: the mailshot machine

Its specification sheet quotes a tray taking 15 envelopes — a detail no other machine of this size makes anything of, and yet it decides its real use. A mailing of a hundred envelopes is handled here in seven loads, without feeding sheet by sheet.

And that is where the choice of ink takes on its full meaning. The 934 and 935 are pigment inks: the particles stay at the surface instead of being absorbed. On an envelope — rougher paper, often recycled, with extra thickness from the glue — a dye ink bleeds and dilutes; a pigment ink stays crisp, including on an address handled by the postman, and copes with damp.

If you send out post, that is the reason to prefer this machine — and not to replace its cartridges with just any dye-based equivalent.

Standard or XL: here, everything comes in both

Unlike many families where only the black has a second format, all four colours have their XL version. So the calculation is made colour by colour, according to what you actually print.

HP recommends a volume of 200 to 800 pages a month. At the ceiling, a standard 400-page cartridge empties in a fortnight; an XL black lasts more than a month. If your colours only serve a logo, keep them standard: an inkjet cartridge left opened too long ends up drying before it is empty.

What to know before ordering

The machine has no screen, only buttons and indicator lights: the level is read from a workstation or over the network, on Wi-Fi or Ethernet. It prints 29 pages per minute in draft mode, 18 to the ISO standard, holds 225 sheets and receives only 60 at the output — on a long run, the output bin fills long before the cartridge weakens.