Converting an Epson ET-8550 (L8180) to DTF: where the white goes and how to check it

What a DTF conversion changes on the ET-8550

The ET-8550 has six inks: black, cyan, magenta, yellow, photo black and grey. The colour layer of a DTF print needs only cyan, magenta, yellow and black. So a DTF kit puts white in the photo black and grey tanks, and the black tank keeps printing the K. Two channels of white double the white flow, as on the L1800 and L805.

ET-8550 and L8180 are two names for one printer, so this guide covers both. We validated the channel map, the head geometry and the scale on real hardware in September 2026, on an L8180. ZoroPrint uses the same values for both names.

What you need

• A DTF conversion kit with white for the photo black and grey tanks, plus DTF CMYK pigment inks. Do not use sublimation ink or regular Epson ink.
• PET film, TPU powder, and a curing oven or heat press with a cover sheet. See choosing film and powder.
• A RIP that sends raw commands to the printer. ZoroPrint does this on Mac, Windows and Linux, and supports the ET-8550.
• A USB cable, or a network connection on raw port 9100.

Do the conversion

A conversion is done at your own risk, and the printer loses Epson’s warranty. Follow your conversion kit’s instructions for the hardware and for the ink change. We give no firmware advice.

Connect the printer

ZoroPrint does not use the Epson driver. It sends raw ESC/P2 commands straight to the printer, over USB or over the network. Follow connecting the printer. On a network connection, switch on RAW (port 9100) in the printer first. Then choose Epson ET-8550 (or Epson L8180) in the Printer tab.

Run the channel test

On many Epson printers you can capture what the Windows driver sends and see which code goes to which tank. On the ET-8550 you cannot. Its Windows driver speaks ESC/P-R, which sends RGB, not separate ink channels. So the only way to check the mapping is to print it.

1. Load a strip of film and choose Ink settings → Print channel test.
2. Check blocks 1 and 2. On a converted ET-8550 they are photo black and grey, so both must print white.
3. Check blocks 3 to 6. They must print magenta, cyan, black and yellow, in that order.
4. If a block is wrong, open “Wrong colours? Diagnose” in the Printer tab and enter what you saw.

Print the channel test again after you refill the tanks or change inks. One strip of film costs less than one wrong transfer.

Starting settings

These are the RIP defaults for the ET-8550. Press a test on a dark garment, then change one value at a time.

• Resolution: 1440 × 720 for everyday work.
• Ink limit per channel: C 80 %, M 80 %, Y 70 %, K 70 %. Total ink limit: 200 %.
• GCR 60 %. White density 80 %. White choke 0.1 mm, with smart choke on.
• Screening: error diffusion. Layer order: colour first, white on top.
• Bidirectional correction: the RIP sets it for each resolution. You do not need to enter it.

What goes wrong

• Wrong colours after conversion. A blue, pink or one-colour print means the tanks and the mapping do not agree. Print the channel test and use the “Wrong colours?” assistant. The Epson driver cannot give you the answer on this model.
• Colours out of register. If vertical lines look doubled, switch to Expert mode and print the head alignment test at the resolution you use. Enter the result in “Head gap (bidi)”.
• Thin lines across the print. That is banding, not a mapping problem. See fixing banding lines.
• Weak or patchy white. White pigment settles in the tanks and the lines. Follow the daily routine in white ink care.

Next steps

The Epson ET-8550 page lists the full specs and answers the common questions. Download ZoroPrint and print the channel test on your own printer.