OSIR Compatible Ink Cartridge Replacement for HP 934 935 934XL 935XL Ink Cartridges for HP Officejet Pro 6830 6230 6815 6835 6812 6820 6220 Printer (Black/Cyan/Magenta/Yellow, 4-Pack)

The price was very good. The cartridges seem to work well in my printer. Beware when you twist off the “cap”...mine leaked all over my fingers and onto the floor and my white sneaker. I was prepared with a paper towel when opening the next ones—they still leaked and ink got all over my fingers, but I kept the ink from going in the floor or on my shoes.

Bought ink cartridges for an HP printer. When color printing failed to return, I could not get assistance from HP, since they would blame any failure on non-HP products. mipelo_usa was very helpful, replaced the cartridges immediately. Ultimately found my printer had died, thanks to their help. Would definitely use their products again. Very well packaged, and excellent product support.

I will 4 star for now since when I first installed the cartridges, it gave me the black 1 CM strip vertically on the pages due to the ink releasing so quickly. I had to take the cartridges out and clean out the head and the messes, then reinstalled them.Wasting me about 15 pieces of papers to calibrate the printer heads.So far is so good, but I am not sure HP will update the firmware or the printer will detect the 3rd party cartridges then gave you a malfunctioned error.I am continuing monitor this products and will update my fair comments since I has wasted so many 3rd party ink cartridges for this type of printer.

Colorful original with extreme contrast looks virtually identical to the original. Very happy!

The cartridges leaked all over! All over my desk, floor, everything! They are either overfilled or pressurized becaused the ink on 2 of the 4 cartridges was bubbling and flowing out. Not dripping, flowing. And this is not my first rodeo with ink cartridges. I replace the ink 3+ times a year. And, yes, I followed the instructions. It bubbled out of the hole that you pull the thin, plastic, orange tab off, and flowed out of the larger hole on the bottom of the cartridge with the twist off knob thing.

Price is right, installation very easy. Beware: When installing black ink cartridge, be careful removing the tape. Ink spilled all over the table. Luckily, I had some paper spread out already, so there was minimal cleaning up. Worst part was washing black ink off my hands. Installing color cartridges was fine, no drips or mess. Print quality is good on my machine. I would definitely buy this product again. Now that I know about spilling ink, I will be ready!

Just installed my new cartridges in my HP printer. Both the yellow and black cartridges leaked when I took them out of the packages. I installed them anyway (after I wiped everything off). The black ink left large trails of ink on the first few pages. The streaks seem to be subsiding. The print quality is okay. Kind of messy to use. Not a bad price, but I doubt I'll order these again.

So, I bought these ink cartridges and was excited to start using them when the original HP Officejet Pro 6830 cartridges finished. I was sad and upset because I did not get to print much and soon after installing them I started getting error messages. The error messages said that there was a cartridge/s missing or counterfeit being used or installed. I was super frustrated because I had a deadline ended up going to a 24 hour FedEx store to print my papers. Really!! I hope the company that made or is selling this product reads this review and takes responsibility for their product. I ended up spending more money at the end!! :(

Ink ran from cartridges once open, luckily didn't spill on anything important. Won't print green.