Refill the HP #950 and #951 cartriges

You need two sets of cartridges for refilling and has to be rotated in the printer.
You will have set "A" and set "B".
Example. You will have two black cartridges. When "A" black runs empty take it out and put in "B" black cartridge and then refill "A" black cartridge. When "B" black cartridges runs empty then take it out and put in "A" cartridge.

Refilling Instructions:
1. Look at the end of the cartridge for a plastic ball that is plugging up the filling hole.
2. Stand the cartridge on end where the plastic ball is facing up.
3. Put the "L" tool on top of the plastic filling hole ball and tap it with a hammer to knock the plastic ball into the cartridge.

4. Put the blunt needle onto the syringe and fill the syringe with ink.
Black 950 Cartridge will hold 20ml of ink, High Capacity Black cartridge holds 40ml.
Color 951 Cartridge will hold 10ml of ink, High Capacity Color cartridge holds 20ml.
Black 932 Cartridge will hold 10ml of ink, High Capacity Black cartridge holds 20ml.
Color 933 Cartridge will hold 5ml of ink, High Capacity Color cartridge holds 10ml.

5. Seal the filling hole with the rubber ball included with your refilling kit, by putting the rubber ball on top of the filling hole and press the rubber ball with the "L" tool until you feel it snap into place.

Note: On your second refill you do not need to knock the ball into the cartridge. Just screw the ball remover half way into the rubber ball and pull it out. If you did not tear up the rubber ball you can use it again to seal the hole.

6. When using a refilled cartridge "A" that reads empty you will get a pop up box:

You are ready to print. If you have trouble printing because the chip reads empty then look at the chart below for an alternative.

In order to get the cartridge to work again after refilling, the ink level monitor must be switched off within the printer driver. This could be done in the following way (depending on the printer):
HP OfficeJet Pro 8100 1. On the printer control panel, press and hold the (Wireless) and (Resume) buttons. 2. The ink supply icons will blink four times. 3. Press and hold the (Wireless) and (Resume) buttons again to turn usage information collection back on.	HP OfficeJet Pro 8600 1. On the printer control panel, touch (right arrow), and then touch (Setup). 2. Select (Preferences), and then select (Cartridge Chip Information). 3. Touch (OK) to turn off usage information collection. This information is on page 93 of the 8600 printer manual located here: http://www.refillinstructions.com/HP/8600-Printer-Manual.pdf
You can cycle cartridges through to reset the level. You will need two extra cartridges and the one you refilled. First, put the refilled cartridge in the printer. Allow it to recognize the cartridge and print an alignment page. Take that cartridge out and place in the first extra cartridge. Allow it to recognize and print an alignment page. Take the first extra cartridge out and place the second extra cartridge in. Allow it to recognize and print an alignment page. Take the second extra cartridge out. Place the refilled cartridge back in the printer. It will print an alignment page and then the estimated ink level will be reset to full.
The HP Officejet 8600 has a so called “cartridge protection” feature. In the toolbox there is a tab named “HP Cartridge Protection”, where you can choose if you want to enable or disable this function. The default setting here is “enable” which results in the cartridges to work only in this particular printer. If you install the cartridges treated with this “protection” feature in another printer, they will not work and a message pops up. Go to http://www.refillinstructions.com/HP/H03.JPG to see a snapshot of customer information dealing with this topic. We have tested the instruction about how to switch off the ink level indicator before it was released to our customers. So the only reason for the above mentioned problem I could think of is the “protection” feature.