Frequently Asked Questions

Why does magenta matter for copied forms with stamps and highlights?

Red stamps, "URGENT" markings, highlighted totals and signature flags all lean on the magenta channel. When magenta runs low, those accents are the first thing to go pale on a copy — the text still reads, but the emphasis that made the document scannable disappears. This TN331M keeps those reds and purples at full strength.

How far does one magenta cartridge go on a copy desk?

Roughly 1,500 pages for $32.86 — about 2.19¢ per page. In practice, a DCP-L8400 doing mostly black-and-white copying sips magenta, so a single cartridge can serve for a long stretch between changes.

Which printers does the TN331 magenta fit?

The TN331M is made for these Brother models: HL-L8250CDN, HL-L8350CDW, HL-L8350CDWT and MFC-L8600CDW On the DCP-L8400 it sits alongside the black, cyan and yellow as one of four independent positions.

The other colors are fine — can magenta be changed by itself?

Yes, and that is how it is designed to work. Each TN331 color is its own cartridge, so when magenta fades you replace magenta only. There is no bundle you are forced into and no reason to discard healthy cartridges.

Should a heavy color desk consider the TN336 magenta instead?

If color copies are a daily flood rather than an accent, the TN336 magenta fits the same machines at roughly 3,500 pages per cartridge. For accent-level color — stamps, logos, highlighted sections — this TN331's 1,500 pages are the sensible buy.

What coverage comes with this cartridge?

A 1-year warranty and 1-year free returns, per our shipping and returns policy. Orders leave from warehouses in IL, PA, GA and CA, and support is reachable 9 AM–5 PM CST. For the three tiers of this platform priced side by side — TN331, TN336 and TN339 — and the per-page math that separates two tiers sharing one shelf price, see our Best Brother TN331 Toner Cartridges — it shows why the tier with the longer rated life costs no more at the shelf.

How should a spare magenta be stored at the copy desk until it goes in?

Keep the TN331M sealed in its bag and box, lying flat in a cool, dry drawer away from heat and direct sunlight. A cartridge waiting its turn for months loses nothing stored that way. If more than one spare is on hand, mark the delivery month on each box and install the oldest first, so stock rotates instead of aging in the back of the drawer.

Magenta is fading but the replacement has not arrived — is there a short bridge?

Yes: take the TN331M out and rock it gently side to side a few times, then reinstall it. That redistributes the toner still inside and usually buys a modest run of acceptable pages. It is a bridge, not a refill — the cartridge is still near the end of its roughly 1,500 pages — so treat any recovery as time to get the spare ordered, not as a fix.

How do I make sure the reorder is magenta and not a look-alike color?

Read the suffix letter on the cartridge you pull out, not just the family name. TN331M is magenta; the same shelf holds TN331C for cyan, TN331Y for yellow and TN331BK for black, and the codes differ by a single letter that is easy to misread at speed. Thirty seconds with the old label is the cheapest accuracy check in the whole reorder.

What should happen to the empty magenta cartridge?

Bag it and hold it briefly until the replacement has proven itself on real copies — that way, if the new cartridge is ever questioned, the old one is still there as evidence of what came out. After that, send empties out in batches through a toner recycling route instead of letting them pile up at the desk; a copy desk cycles colors slowly, so a small collection box fills at a manageable pace.

About This TN331 Magenta Cartridge for the Brother DCP-L8400

Magenta is the accent color of office paperwork — the stamp, the flag, the highlighted line — and this TN331M keeps those accents bold across about 1,500 pages on the DCP-L8400. When the whole desk is due rather than one color, the TN331 four-color set at $74.41 undercuts the four singles by $55.50; for everyday black volume, the TN331 black carries the load at about 1.25¢ a page.