What Ink Does the Brother MFC-J6935DW Use?

by William Elward Last Updated: November 7, 2026

Quick answer: The Brother MFC-J6935DW uses Brother LC3029 super-high-yield INKvestment cartridges: black (about 3,000 pages) plus cyan, magenta and yellow (about 1,500 pages each). Castle Ink sells a remanufactured LC3029 4-pack and singles: LC3029 Black, Cyan, Magenta and Yellow.

Two look-alikes catch people out. The near-identical MFC-J6930DW takes LC3017/LC3019, not LC3029, and the successor MFC-J6945DW takes LC3037/LC3039. Neither fits the J6935DW.

CastleScore · November 2026

88/100 — Highly Recommended

Brother MFC-J6935DW

Pillar (weight)	Score	What it is based on
Owner ratings (28%)	84	4.8★ average across 22 ratings at Best Buy. Weighted down because the sample is small.
Expert reviews (18%)	—	No published numeric expert score we could verify (PCMag named it an Editors' Choice).
Cost per page (24%)	95	About 0.4¢ per black page and 0.7¢ per color cartridge-page with our remanufactured LC3029 super-high-yield cartridges (3,000 black / 1,500 color).
Reliability (13%)	80	Most-reported problems: "Cannot Detect" after a cartridge swap (Brother says it was inserted too quickly); "Paper Jam" that persists after clearing, from scraps or an unevenly closed Jam Clear Cover; "Unable to Print XX" from foreign objects; eventual "Ink Absorber Full" service messages.
Features (12%)	92	Print, copy, scan and fax up to 11 x 17 in., two paper trays, document feeder, auto two-sided printing, Wi-Fi, Ethernet, NFC, large touchscreen, PCL5 printer language.
Value (5%)	85	Running cost and owner satisfaction

Limited data: We could not verify a published numeric expert score for this printer (PCMag named it an Editors' Choice), so that weight is spread across the other pillars. Its owner ratings come from a small sample, so we weight them down.

Older model. This printer is no longer a current model, but its LC3029 cartridges are still widely sold, including our remanufactured versions.

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 7, 2026. It is not a customer review. See every ranked printer or how the score works.

The cartridges, pictured

Our own remanufactured cartridges, the same ones we ship.

What Ink Does the Brother MFC-J6935DW Take?

Cartridge	Brother part no.	Approx. yield	Castle Ink option
LC3029 Black	LC3029BK	~3,000 pages	Remanufactured, $12.95
LC3029 Cyan	LC3029C	~1,500 pages	Remanufactured, $10.95
LC3029 Magenta	LC3029M	~1,500 pages	Remanufactured, $10.95
LC3029 Yellow	LC3029Y	~1,500 pages	Remanufactured, $10.95
LC3029 4-pack	LC3029BK/C/M/Y	One of each	Remanufactured, $35.95

Yields are Brother's ISO figures, and 4inkjets lists the same 3,000/1,500 yields for its LC3029 cartridges. LC3029 comes in one size only; there is no standard-yield version. Our cartridges are genuine Brother shells, cleaned, refilled and print-tested.

What Does MFC-J6935DW Ink Cost per Page?

Very little for an 11 x 17 business inkjet: about 0.4¢ per black page and 0.7¢ per color cartridge-page with our remanufactured LC3029. Brother's own LC3029BK sells for around $27 to $39 at retail, roughly 1¢ a page.

How Do I Replace the Ink in the MFC-J6935DW?

Open the ink cartridge cover on the front right of the printer.
Press the release lever above the empty cartridge and pull it out.
Remove the orange protective cap from the new cartridge.
Push it into the matching color slot slowly and firmly until it locks. Brother says inserting too quickly is the usual cause of a "Cannot Detect" message.
Close the cover.

Which Other Printers Use LC3029?

Brother lists LC3029 for the MFC-J5830DW, MFC-J5830DW XL, MFC-J5930DW, MFC-J6535DW, MFC-J6535DW XL and MFC-J6935DW.

What MFC-J6935DW owners ask

These come from Brother's support FAQs and manual for this model, owner reviews at Best Buy and elsewhere, and expert reviews, answered in our words.

Why does it say "Cannot Detect" after I replace a cartridge?

Brother's own explanation is that the cartridge was installed too quickly for the printer to detect. Take it out and reinstall it slowly and firmly until it locks. Brother also notes non-Brother ink may not be detected; our LC3029 keep Brother's original shell.

It still says "Paper Jam" after I removed the paper. What now?

Brother lists this as a common question for the J6935DW. Usually a scrap of paper is still inside or the Jam Clear Cover at the back isn't closed evenly at both ends. Brother also points to paper dust on the pick-up rollers as a cause of repeat jams, so clean those too.

What does "Unable to Print XX" mean?

The manual says it's a mechanical problem or a foreign object such as a paper clip inside. Open the scanner cover, remove any scraps, then unplug the printer for several minutes. If you can't print received faxes, transfer them to a computer or another fax machine first.

Can it really copy and scan 11 x 17?

Yes. PCMag noted it's one of the few small-office inkjets that can print, copy, scan and fax at tabloid size, and gave it an Editors' Choice.

What's the difference between the J6935DW and J6930DW?

PCMag says the J6935DW adds the PCL5 printer language and a low-paper warning. The bigger practical difference is the ink: the J6935DW is an INKvestment model that takes LC3029, while the J6930DW takes LC3017/LC3019.

MFC-J6935DW quirks worth knowing

Brother's error list includes "Ink Absorber Full," which means the internal waste-ink pad needs service.
It's a big machine: Consumer Reports lists a set-up footprint of about 20 x 22 x 33 in. and a weight of about 52 lb.
Best Buy owners rate it 4.8 stars, but across only 22 reviews.
In Europe the same model takes LC3217/LC3219 cartridges; in the US it's LC3029.

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