Frequently Asked Questions

How can I confirm TK3112 is the part number my printer actually calls for?

Open the supplies information screen on the FS-4100DN, or slide the old cartridge partway out and read the label on its top face. When that label reads TK3112, this single black cartridge at $36.33 is the correct refill — there is no other number you need to match.

What arrives in the box with this single cartridge?

One factory-sealed TK3112 cartridge, ready to drop in as soon as the seal tab is pulled. There are no extra parts to assemble and nothing else to buy before you can print again.

How long does a 15,500-page rating typically last in a small office?

The rating is measured on standard test pages at ordinary text coverage, and everyday letters, quotes and reports come close to it. On one machine printing a few hundred pages a week, that works out to many months between changes rather than a supply you reorder constantly.

Can I change it myself, or does it need a service visit?

You can do it in about two minutes. Open the front cover, slide the spent unit out, rock the new TK3112 side to side a few times so the toner distributes evenly, then push it in until it seats with a click. No tools, no technician.

My first prints look light and washed out. Is something wrong?

Almost certainly not. Toner settles during shipping, so take the cartridge out, rock it gently five or six times, and run ten normal pages — the density usually settles quickly. Still faint after that? Call us Monday through Friday, 9 AM to 5 PM CST and we will help you sort it out.

What backing comes with this cartridge after I install it?

It carries a 1-year warranty, and returns are free for that entire year. If the unit underperforms at any point in that window, reach out and we will put it right rather than leave you holding a cartridge you cannot use.

What does a page from this cartridge actually cost?

Divide the $36.33 price by the 15,500-page rating and the TK3112 works out at roughly 0.23 cents per page at standard coverage. Denser pages raise that figure a little and lighter ones lower it, but for ordinary office text it is a useful planning number: a 500-page report run costs a little over a dollar in toner.

Can I predict roughly when this cartridge will run out?

Yes, with the printer's own page counter. Note the counter reading on the FS-4100DN when the TK3112 goes in, then check it a month later. That difference is your real monthly volume; divide it into 15,500 and you have a realistic estimate of the months this cartridge will cover, so the replacement can be ordered before the machine ever stops.

I bought my replacement early — how should the spare wait its turn?

Leave it sealed in its box, stored flat at normal room temperature, away from direct sunlight, radiators and damp floors. A factory-sealed TK3112 waits patiently for a long time in those conditions and prints normally when finally fitted. Avoid opening the packaging to "check" it — the seal is what keeps the toner inside settled, dry and ready.

Where does the empty cartridge go once the new one is running?

Back into the fresh cartridge's packaging first, which keeps loose toner dust contained. After that, toner empties are accepted by most office-supply recycling programs and municipal e-waste collections — a far better route than the ordinary trash. If your office goes through cartridges regularly, keeping one collection box by the printer makes the habit effortless for everyone.

About This Cartridge

This listing is for one compatible Kyocera-Mita TK3112 black toner cartridge, made for the FS-4100DN and priced at $36.33. It suits the buyer whose single workgroup printer has just run dry and who wants a rated 15,500 pages without stepping up to a multi-pack. Orders ship from the nearest of our IL, PA, GA and CA warehouses, with timing and returns details on our shipping and returns page.