What Ink Does the Epson Expression ET-3600 Use?

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Quick answer: The Epson Expression ET-3600 EcoTank uses Epson 774 pigment black (T774120-S) and Epson 664 Cyan (T664220-S), Magenta (T664320-S) and Yellow (T664420-S) ink bottles. Castle Ink sells a compatible 774 + 664 4-pack for $29.99, plus 774 Black (140 ml, $9.99) and 664 Cyan, Magenta and Yellow singles at $8.99.

The ET-3600 launched in 2016 as a step up from the ET-2550, adding automatic two-sided printing and the larger 774 pigment black. It shares its ink with the WorkForce ET-4550 and the wide-format WorkForce ET-16500. Newer EcoTanks such as the ET-3850 use Epson 502 instead, so check the number before you reorder.

CastleScore · November 2026

86/100 — Highly Recommended

Epson Expression ET-3600

Pillar (weight)ScoreWhat it is based on
Owner ratings (28%) 86 4.48★ average across 771 ratings at Best Buy (4.6, 432 ratings) and Epson (4.3, 339 ratings)
Expert reviews (18%) — No published numeric expert score we could verify.
Cost per page (24%) 99 About 0.12¢ per page blended with our 774/664 4-pack ($29.99: 6,000 black + 6,500 per color pages at Epson's ratings).
Reliability (13%) 78 Most-reported complaints: noisy paper feed; real-world speeds well below the rating; no document feeder for multi-page copies
Features (12%) 72 Print, copy, scan; auto two-sided printing; Wi-Fi, Wi-Fi Direct, Ethernet; small LCD. No document feeder, no fax.
Value (5%) 84 Running cost and owner satisfaction

Limited data: We could not find a published numeric expert score for this printer, so that weight is spread across the other pillars.

Hard to find new. Epson launched the ET-3600 in 2016; we couldn't find a current new listing at major U.S. retailers. Epson 774 and 664 bottles are still sold.

CastleScore is Castle Ink’s own editorial rating, built from retailer star ratings, expert reviews, real cost per page and owner complaint patterns, checked November 8, 2026. It is not a customer review. See every ranked printer or how the score works.

The ink, pictured

Our own compatible 774 and 664 bottles, made in the USA.

What Ink Bottles Does the Epson ET-3600 Take?

Bottle Epson part no. Size Approx. yield (Epson) Castle Ink option
774 Black (pigment) T774120-S 140 ml ~6,000 pages Compatible, 140 ml, $9.99
664 Cyan T664220-S 70 ml ~6,500 pages Compatible, 70 ml, $8.99
664 Magenta T664320-S 70 ml ~6,500 pages Compatible, 70 ml, $8.99
664 Yellow T664420-S 70 ml ~6,500 pages Compatible, 70 ml, $8.99
774 Black + 664 C/M/Y — — — 4-pack, $29.99

Yields are Epson's ratings. The 774 black is pigment ink for crisp text; the 664 colors are dye. Some retailers also list Epson's 664 dye black for the ET-3600, but 774 is what Epson ships in the box, and you should never mix the two blacks in the same tank.

What Does ET-3600 Ink Cost per Page?

Our 774 black is $9.99 for about 6,000 pages (about 0.17¢ a page) and each 664 color $8.99 for about 6,500 (about 0.14¢). With the $29.99 4-pack it works out to roughly 0.12¢ a page blended, a fraction of what cartridge printers cost to run.

How Do I Refill the Epson ET-3600?

  1. Check the ink levels in the tank windows on the front of the printer.
  2. Open the ink tank cover and remove the cap from the tank you're filling.
  3. Open the bottle, insert its tip into the tank port and let the ink flow until it reaches the upper line.
  4. Remove the bottle, recap the tank and close the cover.
  5. Reset the ink levels on the control panel when prompted.

Keep a paper towel handy; Trusted Reviews found it hard to fill without getting ink on your fingers.

Which Other Printers Use Epson 774 and 664?

774 black plus 664 colors: the WorkForce ET-4550 and WorkForce ET-16500. 664 colors with 664 black: the Expression ET-2500, ET-2550, ET-2600 and ET-2650 and the WorkForce ET-4500. See all Epson 664 and 774 ink bottles.

What ET-3600 owners ask

These come from Best Buy and Epson reviews, Best Buy Q&A and reviews from Trusted Reviews and Tech Advisor, answered in our words.

I accidentally filled the black tank with 502 ink. What now?

Stop printing and contact Epson support; the two inks are different formulations. To avoid it, check for 774 on the bottle before you fill.

Does it have a document feeder or fax?

No. It scans and copies from the flatbed only, and it has no fax. Owners who need either usually move up to the ET-4550 or a newer EcoTank.

Why is it so loud?

The paper feed is noisy; Trusted Reviews called it out. It's normal for this model, not a fault.

How long does the ink last?

A long time. The box included enough ink for about 11,000 black pages, and replacement bottles are rated for about 6,000 black and 6,500 color pages each.

ET-3600 quirks worth knowing

  • It prints two-sided automatically, a step up from the ET-2550.
  • Epson rates it at 13.7 pages a minute in black and 7.3 in color; reviewers measured noticeably slower real-world speeds.
  • It connects by Wi-Fi, Wi-Fi Direct, Ethernet and USB.
  • The display is small and basic.

Frequently Asked Questions

What ink does the Epson ET-3600 use?

Epson 774 pigment black (T774120-S) and Epson 664 cyan, magenta and yellow (T664220-S, T664320-S, T664420-S).

Does the ET-3600 use the same ink as the ET-2550?

The colors are the same (664), but the ET-2550 uses 664 black while the ET-3600 uses 774 pigment black.

Can I use Epson 502 ink in the ET-3600?

No. Epson 502 is for newer EcoTanks like the ET-2850 and ET-3850. The ET-3600 takes 774 and 664.

Other printers that use Epson 774 / 664

Epson WorkForce ET-4550

More Epson ink guides: Epson EcoTank ET-3850 · Epson EcoTank ET-2980 · Epson EcoTank ET-2800 · find any printer

Replacing it? Our highest-rated alternatives

Sources

Ratings and prices were checked on November 8, 2026 and will change over time.

Need replacement Epson ink cartridges? Shop Epson ink cartridges at Castle Ink. Remanufactured, up to 70% less than OEM, and shipped the same day when you order by 4 PM ET.

Written and reviewed by — Founder of Castle Ink, 20+ years in the printer & imaging supplies industry.

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