Save money on the InkTec Ink Refill Kit for No. 41 Tri Color (51641A) - Hewlett Packard (HP). Manufacturer offers a 100% Quality & Satisfaction Guarantee on the 51641C Ink Refill kit. Free Shipping on Orders over $50.

Hitachi Printing Solutions is one of the world's most respected manufacturers of printers and imaging supplies. Manufacturing consumables under its well-known Dataproducts brand name, the company's products range from laser printer toner cartridges to ink jet solutions to all types of typewriter and printer ribbons, along with fax thermal ribbons... hundreds of products in total. The company is dedicated to providing an ever-expanding offering of the highest quality imaging products, along with complete customer satisfaction.This product is designed for HP DeskJet 600, 600 Lotus, 600C, 600D, 600K, 660C, 660C Lotus, 660D, 660J, 660K, 670C, 672C, 680C, 682C, 690C, 692C, 693C, 694C, 695C, 697C, HP DeskWriter 600, 660C, 680C, 690C, 694C, HP OfficeJet 500, 520, 570, 580, 590, 600, 610, 630, 635.

This refill kit is designed for use with the following printers: HP DeskJet 600, 600 Lotus, 600C, 600D, 600K, 660C, 660C Lotus, 660D, 660J, 660K, 670C, 672C, 680C, 682C, 690C, 692C, 693C, 694C, 695C, 697C; HP DeskWriter 600, 660C, 680C, 690C, 694C; HP OfficeJet 500, 520, 570, 580, 590, 600, 610, 630, and 635.

• Quality cyan, magenta, and yellow ink
• Fully compatible cartridge that will not void your printer warranty
• Saves you up to 20% more vs OEM brand
• Specialty formulated inks to enhance your printer performance
• Equivalent to 4 OEM cartridges

If your refilled cartridge fails to work, place the print head in a shallow dish of water with one drop of detergent. Let it soak over night, and then wipe the head dry and install. The soak will remove dried ink deposits that cause the failure. Run the "clean head" option on the printer after installation.

I just wanted to add to my review above that after having used this product awhile, I find the colors are just as bright and they compare very well to original HP ink. I think the colors seemed dull at first because all the colors were not flowing full bore when I first filled the cartridge. Again, this is a great product as long as you have the patience to work through getting all the colors to flow consistantly.

The good news about this product is that refilling the ink in my existing HP 51649A color cartridge was easy to do and it is for the most part mess free (although my red bottle was leaking somewhat when I got it). The ink from this leak was fairly easy to wash off my hands. The instructions are clear. Product comes with a "cracker" to break and remove the top of the existing cartridge. There are then 3 bays in the cartridge with holes on the top of each bay that are to be refilled with each color. Product then provides a replacement top, which easily snaps on and off, so that ink may be replaced again.

The ink is not exactly the same as HP ink, only in that I thought my reds and greens came out somewhat dull, not as bright as HP ink. I can live with it. But as far as steadfastness, etc., I found no difference in this ink from HP ink. (I'm not sure about long-term steadfastness and durabilty on paper, but I'd say from my short use of this product that this ink is the same in that regard as HP ink). Also, there certainly is enough ink in the refill bottles to refill a cartridge at least 3 times (the box says 4).

The bad news is that the ease of your success with this product really depends on the shape your HP cartridge is in (and even if it is in great shape, you will probably still have to work at getting all the colors to print again). If any of the ink has dried out in your cartridge, it will take some time to get all the colors flowing (printing) again. The ink in my cartridge had just run out, so it wasn't particularly dried out, and it took me SEVERAL attempted printouts to get all the colors flowing again. I had to use the HP printer software to clean the print heads (which individually prints each color) many times before all the colors would flow when I tried to print something else. Even then, one or more of the colors would usually stop printing if I let the printer sit as short as 5 minutes. So, I would have to repeat the clean head procedure again, and then go back and re-print whatever I was trying to print. Again, it took considerable work and it was many, many printouts before I was sure each color would reliably print. I would say my experience is typical.

So, DO NOT expect to just refill the ink and start printing again like it is a new cartridge. And do not try to print on any important or expensive forms until you have printed several test printouts to insure that all colors are indeed flowing again. Even then, you may still have to work and play with it to get all the colors to consistently flow.

I rate this product a 4, because of the price and because for my use and personality (a technically inclined home user who would like to try to save some money), it worked well. College students may also find it works well for their needs. But, if you are a technically dis-inclined person, or if you have no patience and expect things to work easily, or if you have something important that needs to be printed right away, you would be better off buying a new HP cartridge.