Pitney Bowes
cartridges are incredible expensive and well worth refilling. The factory-supplied cartridges seem to dry out before they are empty and this can make your per-unit mailing costs ridiculously expensive. This job can get a bit messy, so cover your work surface well and use Latex gloves.
Instructions
1. Take the sticker of the top of the original cartridge. You can just peel it off.
2. Locate the hole under the sticker that's covered by silver foil. You may well see more than one hole. If you can't see a hole at all you can create one with the needle. Make the hole about three-quarters of the way down the top of the cartridge, in the center.
3. Fill the cartridge with 8ml of ink. Printing postage is a bit like printing money and the Postal Service--who license postage meters for you to print your own postage--have strict requirements relating to ink. It has to be florescent, you can't use regular red ink. See Resources for a link to a supplier of postage ink.
4. Insert the needle through your hole. Don't use any hole that has a rubber grommet---that's not the right hole. As you push through you should feel a little resistance from the sponge inside the cartridge.
5. Push the needle through and fill.
6. Cover the filling hole with electrical tape and leave the cartridge on some paper towels for a while to allow the cartridge to stop dripping. This bit is messy.
7. Insert the cartridge back in the postage meter.
