Before You Start
Refilling an Epson EcoTank printer with sublimation ink is a simple job, but doing it carelessly can cause problems that are much harder to fix. Air bubbles in the ink lines, mixed ink brands causing clogs, and overfilled tanks leading to leaks are all avoidable if you follow a few basic steps. This guide covers the refill process for EcoTank models like the ET-2810, ET-2850, ET-2862, ET-2950, and similar printers with front-mounted ink tanks.
What You'll Need
Have the following ready before you open the ink tanks: your sublimation ink bottles in the correct colours (cyan, magenta, yellow, and black), a pair of disposable gloves, and some paper towels or a lint-free cloth for catching any drips. Sublimation ink stains skin, clothing, and work surfaces, so gloves and a protected workspace are worth the minor effort.
Step-by-Step Refill Process
Step 1: Open the Ink Tank Cover
On most EcoTank models, the ink tanks sit behind a hinged cover on the front right side of the printer. Flip this cover open to reveal the four ink tanks, each colour-coded to match the CMYK inks: cyan, magenta, yellow, and black. The printer can be left powered on during refilling.
Step 2: Open the Tank Cap
Each tank has its own cap. Open only the cap for the colour you're about to refill. On some models, the cap has a small latch you need to flip up before it opens. Don't open all four caps at once, as this increases the chance of dust or debris getting into the tanks.
Step 3: Prepare the Ink Bottle
Hold the sublimation ink bottle upright and snap off the protective cap if it's a new bottle. Genuine Epson-style ink bottles have a keyed nozzle that only fits the correct tank opening, which prevents you from putting the wrong colour in the wrong tank. If you're using a third-party sublimation ink bottle, the nozzle may be a standard tip rather than keyed, so pay careful attention to which tank you're filling.
Step 4: Fill the Tank
Insert the bottle nozzle into the tank opening. For keyed bottles, the nozzle will click into place and ink will flow down by gravity. You don't need to squeeze. For non-keyed bottles, gently squeeze the bottle to control the flow. Fill the tank up to the upper fill line, which is marked on the side of the tank. Do not overfill past this line. Overfilling can cause ink to leak into the printer's internal waste ink area, and in some cases it can cause ink to back up and mix between tanks.
Step 5: Close Up
Remove the ink bottle, close the tank cap firmly, and repeat for any other colours that need topping up. Once all tanks are filled, close the ink tank cover. Wipe away any ink drops on the outside of the tanks or cover with your cloth.
Important Things to Know
Don't Mix Ink Brands
Different sublimation ink brands use different chemical formulations. Mixing brands in the same tank can cause the inks to react with each other, leading to clogs in the print head or inconsistent colour output. If you want to switch from one brand to another, the safest approach is to flush the ink system first. This involves running cleaning cycles to push the old ink through, or in some cases using a flushing solution designed for inkjet printers. It's a time-consuming process, so the easier option is to pick a reliable ink brand and stick with it.
Air Bubbles
You might notice small air bubbles in the ink tank after refilling. This is normal and not usually a problem. The bubbles will rise to the surface and dissipate on their own over a short period. Don't shake or tilt the printer to try to remove them, as this can introduce more air into the ink lines. If you see air bubbles causing print quality issues (white lines or missing colours in your prints), run a nozzle check and then a head cleaning cycle from your printer's maintenance menu.
Don't Let Tanks Run Completely Empty
Try to refill your tanks before they run dry. When a tank empties completely, air gets drawn into the ink line that feeds the print head. This air pocket can cause the print head to lose prime, which means you'll need to run multiple cleaning cycles to push the air out and get ink flowing again. Each cleaning cycle uses ink, so you end up wasting ink to fix a problem that could have been avoided by topping up sooner. A good habit is to refill when the ink level drops to around a quarter full.
Storage and Shelf Life
Store your sublimation ink bottles upright in a cool, dry place away from direct sunlight. Most sublimation inks have a shelf life of around 12 months once opened, though this can vary by brand. Ink that has been sitting open for a long time can thicken or separate, which will cause print quality issues. If your ink looks clumpy or has visible sediment, it's best to replace it rather than risk clogging your print head.
After Refilling
Once you've closed everything up, print a nozzle check pattern from your printer's maintenance menu. This prints a small test pattern that shows whether all colours are flowing correctly. If any lines are missing or broken in the pattern, run a single head cleaning cycle and print the check again. Most of the time, a freshly refilled printer will print perfectly without any cleaning needed.
If you need to stock up on ink, take a look at our sublimation ink range, including the 70ml CMYK ink bundle designed specifically for Epson EcoTank printers.