Canon CLI-451 ink
4 colours — each with its own code and price
- Genuine Canon ink
- For PIXMA iX6840 A3
- 1,645-page yield
Colours and item codes
Each colour is a separate item with its own code, and you order only the one that ran out — not the whole set. The code determines compatibility, not the shape of the cartridge.
Full specifications
| Item type | Genuine Canon ink cartridge |
|---|---|
| Page yield | 1,645 pages |
| Compatible devices | PIXMA iX6840 A3 |
| Recommended use | Operating consumables |
Compatible devices
This item fits the models below. Open a model for its specs and price.
Before you order the cartridge
CLI-451 is a genuine Canon ink cartridge, sold as 4 separate colours (Black, Cyan, Magenta and Yellow), and fits PIXMA iX6840 A3.
PIXMA cartridges come in two very different forms: one that carries ink and the print head together (PG/CL), and one that is ink only with the head fixed in the printer (PGI/CLI). That difference changes everything.
PG/CL vs PGI/CLI
PG and CL cartridges contain the print head — every replacement is a fresh head, which fixes quality problems on its own but raises the cartridge price. PGI and CLI cartridges are ink only with the head fixed in the printer, so they cost less and are sold per colour, but a clogged head needs cleaning or service.
Pigment black is not the same as black
Models that take five tanks (PGI-450 + CLI-451) carry two blacks: a pigment black (PGBK) for text so it prints sharp and does not bleed, and a dye black (BK) used in photo output. They are not interchangeable — each has its own slot and role.
XL and XXL
The same cartridge with more ink and the same fit. Cost per page falls as capacity rises, so if you print regularly the difference pays back within a couple of months. Yield is measured under ISO/IEC 24711 — a standard suite of test pages, not a coverage percentage.
Genuine vs compatible and refilled
The difference is not only price. A genuine item is guaranteed not to leak inside the machine, and a leak reaches the print head or the fuser — which costs many times the price gap. On top of that, a fault caused by a counterfeit consumable voids the warranty; that is written in the device's own warranty certificate, not a condition we add.
Before you open the cartridge
- Do not unwrap it until you are ready to install — the head dries if left exposed
- Do not touch the copper chip or the head nozzles with your fingers
- An opened cartridge is not returnable, so confirm the number before breaking the seal
- Faint printing right after installation usually needs a head clean from the device menu, not another cartridge