Compatible Ink Cartridge LC-421 BK for Brother (LC421BK) (Black) is a reliable way to keep your Brother inkjet printer ready for everyday work—from crisp documents to sharp text on school and office printouts. Dear Customer, if you want predictable results without overpaying, this DrTusz compatible cartridge is designed to deliver the same quality as the original, with deep, clean black that makes every line look confident and professional.
With a capacity of 10 ml, this cartridge is made for efficient, hassle-free printing at home or in a small office. Its estimated yield is up to 240 pages (at 5% coverage), so you can plan your printing calmly—whether you print a few pages a day or prepare larger batches at once. We encourage you to keep a spare on hand, so you’re never surprised by an empty cartridge mid-task.
Want to build a full color setup? Under “Related products” you’ll also find matching cyan, magenta and yellow cartridges, higher-yield XL versions, convenient multipacks, as well as original OEM options and even a specialist head-cleaning fluid to help maintain smooth ink flow. And as always, we carefully protect every parcel before transport, so it arrives in perfect condition.
compatible alternative with original-like print quality;
strong, readable black for everyday documents;
up to 240 pages yield (at 5% coverage);
securely packed for safe delivery
Popular printers that the product is compatible with: Brother DCP-J1050DW, Brother DCP-J1140DW, Brother MFC-J1010DW.
Frequently asked questions about this product
Buying an original printer cartridge often turns out to be a huge expense, exceeding the price of a new printer. So when making a purchase, it’s worth considering the availability of compatible cartridges.
Generic cartridges bearing the DrTusz logo are made from high-quality, specially selected, and tested components available on the market. These cartridges deliver the highest print quality, indistinguishable in any way from prints made with original cartridges.
Additionally, our compatible replacement cartridges are covered by the “Golden Warranty”
program—a warranty valid for the entire lifespan of the cartridge. A key benefit of this program is a quick, hassle-free, and effective claims process.
Bei der riesigen Auswahl an Tinten- und Tonerkartuschen kann man leicht den Überblick verlieren, und die richtige zu finden, ist nicht immer einfach.
Falls Sie die gewünschte Tinte/den gewünschten Toner nicht finden, senden Sie eine E-Mail mit Ihrem Druckermodell an sklep@drtusz.pl. Sie erhalten dann umgehend unser Angebot.
Alternativ können Sie sich auch persönlich von einem unserer Experten beraten lassen. Sie erreichen uns telefonisch unter +49 525-22-33-22 (Montag bis Freitag, 9:00–17:00 Uhr).
Our online store does not buy back empty cartridges
. We only offer free disposal of products that were previously purchased from our store.
Used ink and toner cartridges are hazardous waste and must not be disposed of in regular trash bins—that’s why we offer free disposal
so you can help protect the environment in a simple and safe way. For larger quantities of empty cartridges (10 or more), we’ll arrange for pickup by a courier after you contact us via email; for smaller quantities, you can return them to us at your own expense or bring them in person to our brick-and-mortar store.
Companies and public entities can also obtain a Waste Transfer Form (downloadable from the BDO system) if they generate more than 100 kg of such waste annually.
For details and instructions on how to return used cartridges for disposal, see the article:
Disposal at DoktorTusz
Yes, we accept empty cartridges (ink and toner), but only those purchased from our store.
✓10 or more empty cartridges
– please email us at sklep@drtusz.pl
. Once you’ve contacted us, we’ll arrange for a free pickup by courier.
✓Fewer than 10 empty cartridges
– please also contact us via email in advance. In this case, you’ll send the package at your own expense
to our company’s address.
✓Cartridges from other stores—
we do not accept them.
The process consists of the following steps: 1
. Arrange with us how to return the empty cartridges. 2. Fill out the waste transfer form (BDO):
you can fill out the document yourself on the BDO website (we only accept waste under code 160214).
3. Send the empty containers . 4. Upon receipt of the empty containers, we’ll confirm receipt in the BDO system.
Please note: if you do not generate more than 100 kg of such waste per year, the form is not required
.
To compare printing costs, check the price of a replacement ink or toner cartridge for your printer, and then calculate the cost per page by dividing the price of the cartridge by its yield, expressed in the number of pages.
It’s worth noting that the stated yield is determined in accordance with ISO standards, which influence how the number of pages is measured.
