C3100
The Okidata C3100 is a compact color laser printer from OKI's early office line, aimed at small businesses that wanted in-house color on a budget. It belongs to the Type C6 family: black 43034804, yellow 43034801, magenta 43034802 and the cyan 43034803 — and the cyan is the cartridge stocked on this page. Compatible cartridges keep this veteran printer affordable to operate long after its generation left the showroom.
Printers of the C3100's era survive on a simple bargain: the hardware is long paid for, so the running cost is the whole story. That makes the separate-cartridge layout valuable — a small office printing mostly text spends its money on black and touches the colors only when a document actually needs them. When the C3100's blue tones start to fade, it is the cyan channel asking for attention, and that single cartridge swaps in without disturbing the other three.
Toner Cartridges for C3100
| Cartridge | Color | Page Yield |
|---|---|---|
| 43034803 | Cyan — listing 1 of 2 on this page | See product page |
| 43034803 | Cyan — listing 2 of 2 on this page | See product page |
The full Type C6 set for reference: yellow 43034801, magenta 43034802, cyan 43034803 and black 43034804. This page stocks the cyan cartridge, in the two listings above — both are the same 43034803 supply.
Which cartridge should you buy?
On this page the decision is already narrow: the cyan cartridge is the stocked item, offered in two listings of the same supply, so choose either — the cartridge that arrives is the 43034803 your printer asks for. The wider buying lesson for a C3100 is to order strictly by the number on the cartridge you removed. Type C6 numbers differ by a single final digit per color, and a hurried reorder is how a magenta ends up in a drawer while the cyan slot stays empty. If blue-heavy documents — charts, logos, sky and water in photos — dominate your color work, cyan will be your most frequent purchase and keeping one spare is sensible.
Chip, toner and everyday use
Two habits keep an older color printer like the C3100 honest. First, set the driver default to black-and-white for everyday documents, so routine printing draws only on the black cartridge and the colors are spent deliberately. Second, when a new cartridge goes in, confirm the protective tape has been fully removed and the cartridge is pushed home until it seats — on this generation of machine, a blank page after a cartridge change is far more often a tape or seating problem than a dead cartridge. A gentle side-to-side rock before fitting spreads the toner evenly for the first pages.
Frequently Asked Questions
What toner fits the Oki C3100?
The Type C6 set: yellow 43034801, magenta 43034802, cyan 43034803 and black 43034804. The four cartridges install individually, and this page stocks the cyan.
Is the C3100 expensive to run for a home office?
It stays reasonable if color use is managed. Defaulting the driver to black-and-white means daily printing consumes only the black cartridge — the classic cost trap on small color printers is paying for color toner on monochrome pages.
My C3100 prints blank pages — is the toner empty?
Probably not all four at once. Check that the protective tape came off each cartridge and that every cartridge is fully seated. If a new cartridge still prints blank, a dislodged drum or the LED printhead connection is a likelier cause than four simultaneous toner failures.
Which cartridge fixes faded blue tones on the C3100?
The cyan, 43034803. Blues are built from cyan toner, so washing-out blues with healthy-looking reds and yellows point at that one channel — replace it on its own.
More printers that use the same cartridges
The Type C6 set is shared with these sibling models: C3100n, C3200, C3200n.