Printers

How much ink is left in that dead cartridge?

(Editor’s Note: This story was originally published by PC World. We are reprinting it here as a service to our readers. This story was recently nominated for a Maggie Award for Best Web Article.)

You’ve probably had this experience: Your printer tells you it’s time to change the cartridge, but you dismiss the message and keep printing. Days or weeks later, you’re still using the same cartridge and thinking to yourself that rumors of its death were greatly exaggerated.

Or perhaps your printer simply shuts down when it decides you’ve gone deep enough into its ink well, refusing to operate until you replace the cartridge, though you suspect there’s plenty of ink left.

We decided to do some real lab testing on this issue; and the results confirm what you may have suspected: Many manufacturer-branded (OEM) and third-party (aftermarket) vendor cartridges leave a startling amount of ink unused when they read empty. In fact, some inkjet printers force users to replace black ink cartridges when the cartridge is nearly half full, our study found.

See Macworld’s buying guide to inkjet printers.

Overview

We tested using multifunction printers from four major manufacturers: Canon, Epson, Hewlett-Packard, and Kodak. PC World Test Center results show that models from Canon, Epson, and Kodak reported ink cartridges as being empty when in some cases the tanks had 40 percent of their black ink remaining.

The quantity of unused ink ranged from about 8 percent in an Epson-brand cartridge to a whopping 45 percent in an aftermarket cartridge for a Canon printer. After posting low-ink warnings, those printers wouldn’t let us resume printing until we inserted a new cartridge.

Our test printers typically left more unused ink—in some cases significantly more—when using third-party or aftermarket print cartridges than when using the printer manufacturer’s own cartridges.

When using ink their own manufacturer’s cartridges, the printers displayed several low-ink warning messages before finally shutting down due to low ink. Our HP printer, the Photosmart C5280, was the only one that continued to print even after displaying several low-ink messages, and those messages appeared only when we used an HP print cartridge. When we paired the C5280 with an aftermarket cartridge from LD Products, the printer provided no low-ink warning at all.

It’s important to note that our results show the performance of a clutch of single printers, each paired with just one cartridge. Since OEMs and their aftermarket competitors sell dozens of ink cartridges for a wide variety of printer models, you should consider our results as a kind of snapshot of the way each particular unit deals with “remaining ink.”

Check out the PC World video that accompanied this story.

Why so much leftover ink?

There are valid reasons for not draining an ink cartridge completely, printing experts say. “Many inks, if they run dry, can cause significant damage to the printer,” says Brian Hilton, a senior staff engineer at the Rochester Institute of Technology who holds 29 inkjet patents. “You always want to leave a buffer in the tank so that the printer never runs dry. There should always be a factor of safety included.”

Other observers point out that the quantity of leftover ink is often only a few milliliters. “Printers have generally become more efficient over the years,” says Andy Lippman, a printing analyst with Lyra Research. “In the past, you might have seen 40 milliliters of ink in the black cartridge. Today you’re going to get the same amount of pages out of 7 or 8 milliliters.”

Other people, however—both journalists and independent researchers—have reported very different experiences with ink cartridges. Judging from these findings, printer owners are probably throwing away a lot of usable ink. And that’s a problem, when you consider how expensive the precious fluid is. An average black-ink cartridge contains 8 milliliters of ink and costs about $10 which translates into a cost of $1.25 per milliliter (or more horrifyingly, $1250 per liter).

Liquid gold?

If you bought a gallon of the stuff over the life of your printer, you’d have paid about $4731 for a liquid that one aftermarket vendor told us was “cheap” to make. For some perspective, gasoline costs about $3 per gallon (at the moment), while a gallon of Beluga caviar (imagined as a liquid) costs about $18,000—surprisingly, only about four times as expensive as good old printer ink.

“I personally think that consumers are getting ripped off,” says Steve Pociask, president of the American Consumer Institute, a nonprofit educational and research institute in Washington, D.C. Pociask recently coauthored a 50-page study on the ink jet printer and cartridge market. “In some cases, we found that [the price of] the printer could be 1/8 of the total cost of printing,” says Pociask. “Over the life of the printer—and by that I mean three years—you can easily spend $800 for the printer and ink.”

How we tested

We researched both online and brick-and-mortar tech outlets to find printers that are being used now by high numbers of consumers. We didn’t test color inks because that would have introduced too many variables that might skew the results. For instance, some printers use separate cartridges for each ink, while others use single, tricolor cartridges. A standardized test might not drain the colors evenly, which might give one printer an unfair advantage.

Tony Leung, Senior Data Analyst in the PC World Test Center, weighed each black ink cartridge (to an accuracy of 0.001 gram) to determine the cartridge’s initial weight. We then printed pages until the printer, in response to the low level of ink in the cartridge, prevented us from continuing.

When each printer stopped printing, we removed and weighed its black ink cartridge to determine the cartridge’s out-of-ink weight. Then we removed all of the remaining ink from the cartridge (including the small sponges found in some cartridges), put the cartridge on the scale again, and measured it’s true-empty weight.

This method allowed us to identify the weight of the ink when the cartridge was full, when the printer announced that it was empty, and when it truly was empty.

Using this method, here’s what we found…

Canon

We tested Canon’s Pixma MP610 multifunction printer with black ink cartridges from Canon and from G&G, an aftermarket brand owned by Ninestar Image. The differences in performance between the OEM ink and the aftermarket ink were striking. With the Canon cartridge installed, the printer stopped printing when 24 percent of the ink remained in the tank. Specifically, the full tank of ink weighed 27.333 grams, and the unused ink in the tank at nominal empty weighed 6.459 grams.

Canon didn’t dispute our results, but the company pointed out that its printers do allow users to print after the initial low-ink warning. “There are typically a series of warnings before the ink is out, alerting users to ink status,” spokesperson Kevin McCarthy wrote in an e-mail message. (We calculated the remaining ink weight at the point when the printer actually shut down, which was after the preliminary warnings appeared.)

When equipped with the aftermarket G&G cartridge, the Canon printer shut down with nearly 45 percent of the ink left. The full tank of ink weighed 27.320 grams, and its remaining ink weighed 12.277 grams.

G&G responded by running its own tests with a different Canon printer, the Pixma iX4000. (The vendor says the model that the PC World Test Center used wasn’t available in its workshop at the time of testing.)

G&G told us that it tested three of its color cartridges—magenta, blue, and yellow—and found that the amount of residual ink ranged from 5.5 percent (for yellow) to 17 percent (for magenta). (Again, we limited our testing to black ink cartridges only.) Canon declined to comment on our test findings with the G&G print cartridge.

Subscribe to the Best of Macworld Newsletter

Comments