Do You Need to Refill Both Canon PG-275 and CL-276 Cartridges? Complete Beginner Guide

Question:

I am refilling ink cartridges for the first time after watching your "No.1 Detailed Guide to Refill Canon PG-275, CL-276, PG-275XL & CL-276XL" video. If I am refilling one cartridge, do I also have to fill the color cartridge, or can I refill only the cartridge that needs ink?

Answer:

Do You Have to Refill the Color Cartridge Too?

No, you generally do not have to refill both cartridges at the same time. If your Canon PG-275 black cartridge needs ink but your CL-276 color cartridge still contains sufficient ink and is printing correctly, you can refill only the black cartridge.

The same applies in reverse. If the CL-276 color cartridge is running low but the PG-275 black cartridge is still working properly, you can refill only the color cartridge.

However, there is an important distinction between not needing to refill both cartridges simultaneously and allowing one cartridge to remain completely dry.

For most Canon printers using PG-275/PG-275XL and CL-276/CL-276XL cartridges, we recommend keeping both cartridges installed and preventing either cartridge from becoming completely dried out.

Why You Should Avoid Letting a Cartridge Run Completely Dry

The PG-275 and CL-276 cartridges are Canon FINE-style cartridges, meaning the printhead/nozzle assembly is built directly into the cartridge itself.

These cartridges use thermal inkjet technology. Tiny heating elements inside the cartridge heat the ink and create microscopic bubbles that eject droplets through the nozzles.

The ink therefore does more than simply provide color-it also helps cool the firing elements.

If you repeatedly print with a cartridge that has little or no ink remaining, the heating elements may operate without adequate ink around them. In some cases, this can permanently damage the cartridge's integrated printhead.

For that reason, we recommend refilling a cartridge before it becomes completely dry whenever possible.

What If I Only Want to Print in Black?

This is where things can become a little confusing.

Even if you primarily print black documents, many Canon printers still expect both the black and color cartridges to be installed. Depending on the printer model, driver settings, and type of document being printed, the printer may also occasionally use small amounts of color ink.

For example, color ink can sometimes be involved in:

• Printer cleaning or maintenance cycles

• Certain grayscale printing modes

• Composite black printing

• Photo or graphics printing

• Printer calibration or servicing routines

Therefore, selecting "black and white" or "grayscale" does not necessarily guarantee that the printer will never use color ink.

Some Canon models can continue printing temporarily when one cartridge is considered empty, especially after the ink-level monitoring function has been overridden. However, the exact behavior varies depending on the printer model and firmware.

Does the Color Cartridge Have to Be Full?

No. The color cartridge does not have to be completely full simply because you are refilling the black cartridge.

If your CL-276 cartridge still has ink and prints cyan, magenta, and yellow correctly, you can leave it alone.

You would normally refill it when:

• The color output becomes weak or incomplete.

• One or more colors begin disappearing from a nozzle test.

• You know from usage that the cartridge is getting low.

• You can see that the internal sponge is becoming depleted.

• The cartridge has stopped printing because the ink supply has become too low.

It is often better to refill slightly early rather than waiting until the sponge and printhead are completely dry.

Special Consideration for the CL-276 Color Cartridge

The CL-276 contains three colors inside one cartridge:

• Cyan

• Magenta

• Yellow

Each color occupies a separate section of the cartridge.

When refilling it, you do not necessarily need to add the same quantity of ink to all three chambers unless all three colors have been used equally.

For example, if cyan has been consumed more heavily than yellow, the cyan chamber may need more ink.

Be careful not to overfill the cartridge. Adding too much ink can oversaturate the internal sponge and cause leaking, cross-contamination between colors, dripping from the printhead, or poor printing.

Also make sure that the correct ink color goes into the correct refill hole. Mixing even a small amount of the wrong color into another chamber can noticeably change printed colors.

The Ink-Level Display May Still Say "Low" After Refilling

One of the most important things for first-time Canon cartridge refillers to understand is that adding ink does not necessarily reset the electronic ink-level reading.

The printer normally estimates ink consumption electronically. It does not directly look inside your cartridge and recognize that you manually added more ink.

Therefore, after refilling a PG-275 or CL-276 cartridge, you may still receive messages indicating that the cartridge is:

• Low on ink

• Empty

• Out of ink

• Unable to determine the ink level

This does not automatically mean that your refill failed.

Once the printer determines that a cartridge has reached the electronically calculated empty condition, many Canon printers allow you to disable ink-level monitoring for that cartridge by following the instructions displayed on the printer or computer. This frequently involves holding a printer button, often the Stop/Cancel or Resume-type button, for several seconds, although the exact procedure depends on the printer model.

After monitoring has been disabled, you become responsible for manually keeping track of the cartridge's ink supply. You should not rely on the printer's ink gauge to tell you when the cartridge needs another refill.

If the Other Cartridge Is Already Empty

If you are asking because your black cartridge needs refilling and the color cartridge is already completely empty, we would recommend refilling or replacing the color cartridge as well rather than intentionally continuing to operate it dry.

Likewise, if the black cartridge is empty while you are refilling only the color cartridge, it is generally better to restore ink to the black cartridge too.

You do not necessarily have to fill both cartridges to maximum capacity. The goal is simply to avoid operating a thermal printhead cartridge while it is completely dry.

After Refilling the Cartridge

After refilling, give the cartridge a little time for the ink to distribute through the internal sponge toward the printhead. Before installing it, inspect the nozzle area and make sure ink is not pouring or dripping excessively from the cartridge.

A small amount of ink visible at the nozzle area can be normal, but continuous dripping may indicate overfilling.

After installation, print a nozzle check or a simple test page. If part of the print is missing, avoid immediately running many cleaning cycles one after another. Repeated cleaning consumes a substantial amount of ink and can sometimes make troubleshooting more difficult.

If the cartridge was allowed to become completely dry before being refilled, restoring it can also be more difficult because air may have entered the sponge and nozzle area or dried ink may be blocking some nozzles.

This is another reason we recommend refilling before the cartridge is completely exhausted.

The Simple Answer

If your black cartridge needs ink but your color cartridge still has ink and works properly, refill only the black cartridge.

If your color cartridge needs ink but your black cartridge is still working properly, refill only the color cartridge.

You do not have to refill both simply because you opened one cartridge. However, keeping both cartridges from becoming completely dry is a good practice because the printhead is integrated into each cartridge and can potentially be damaged by prolonged dry operation.

Addressing printer problems can be complicated because many of these issues require hands-on inspection and testing. For that reason, we're unable to provide individual remote troubleshooting, repair suggestions, or step-by-step support for printer repairs. We do offer in-person evaluation and repair through our BCH Technologies printer diagnostic and repair facility [https://bchtechnologies.com/printer-repair-service]. Because demand is high, repairs are handled on a first-come, first-served basis, and there may be a wait of several weeks before a printer can be accepted for drop-off. Our repair options are structured around either complete printers or individual components, with instructions provided for the appropriate service. We also recognize that professional repair is not always the most economical choice, so we strongly encourage self-help and online research whenever practical. A good place to begin is YouTube and the BCH Technologies YouTube channel [https://youtube.com/@bchtechnologies]. On our channel homepage, you can use the search icon near the "About" section to search for your printer model, cartridge number, error code, or repair topic. We receive dozens of questions each day asking whether we have a particular video, and after producing repair videos for more than nine years, it is difficult to remember every video individually. Using YouTube's search function is usually the quickest way to locate the information you need, and YouTube may also recommend helpful videos from other creators.

Thank you again for reaching out to us and for watching and supporting BCH Technologies. We sincerely appreciate your interest in our cartridge-refilling videos and hope this information makes your first PG-275 or CL-276 refill a little easier and helps you avoid damaging the cartridges while learning the process.