Plotter Ink (3/3): How Much Plotter Ink Should You Buy?

Plotter Ink (3/3): How Much Plotter Ink Should You Buy?

Plotter ink · part 3 of 3
1. How much ink does a plotter actually use?
2. Why one cartridge always runs out first
3. How much plotter ink should you buy? — you are here

Now the actual question: what do you order, and how much of it? Running out mid-plot costs you a deadline. Over-ordering costs you cash and, on a consumable with a date on it, some of that cash never comes back.

Part one gave us ink use per square metre by job type. Part two showed which tank empties first. This part turns both into an order you can place — with a calculator that does the arithmetic for you.

The short version, if you read nothing elseBuy the largest tank available for your dominant channel and the smallest for the ones that barely move. Buy three months, not twelve. Keep one spare of the dominant channel only.

1. What's the right buy for you

Find the row that sounds like your operation.

Your profile Typical volume What to order Keep on the shelf
Architecture / engineering office
Mostly mono CAD on bond 		50–150 m²
per month 		Largest matte black you can get. Smallest tank available in every colour — they will outlast the order either way. 2× matte black.
Nothing else.
Design / consultancy studio
CAD plus renders and boards 		100–250 m²
per month 		Mid-size tanks across the set, with matte black one size up. Check the machine's ink log after three months and adjust. 1× each, plus a second matte black.
Repro / print shop
Posters, signage, mixed work 		300 m²+
per month 		Largest tank on every channel. At this volume the cost per ml is the whole game and shelf life is a non-issue. A full spare set. Downtime costs more than stock.
Photo / fine art studio
High coverage, low sheet count 		30–80 m²
per month 		Mid-size tanks in every colour and photo black. Matte black can be the smallest — on gloss work it barely moves. 1× of each colour. A missing channel stops a print job dead.

A worked example

The brief: an architecture practice runs about 400 A1 plots a month. Roughly 85% are mono CAD on bond; the other 15% are coloured site plans and renders.

Step 1 — the mono half
340 plots × 0.18 ml = 61 ml total
95% of that is matte black
→ 58 ml MBK per month
Step 2 — the colour half
60 plots × 2.00 ml = 120 ml total
30% MBK, about 20% each CMY
→ 36 ml MBK, 24 ml each colour
Step 3 — add maintenance
Head cleaning runs on a timer, not a counter. Add ~8%.
→ ~100 ml MBK and ~26 ml per colour, monthly
The right quarterly order
1 × 330 ml matte black (covers ~300 ml of demand)
1 × 130 ml of each colour (covers ~78 ml of demand, with headroom)
1 spare matte black on the shelf — the only channel worth insuring
⚠ The order they would have placed
A full set of 330 ml tanks, one of each. That puts 330 ml of yellow on the shelf against 26 ml a month of demand — a twelve-month supply of a consumable with an 18–24 month life from the date it was made, not the date it arrived. Half of it will never reach paper.

2. Work out your own order

Two clicks. Pick how much you print, then what you print, and you get your monthly millilitres per channel, the tank size to order for each, and how long one of each will last.

Every quantity is a complete three-month order including about 8% for head maintenance. Step 1: how much do you print?

Light — about 25 m² a month · ~50 A1 plots

Step 2. Now open the line that matches what you print.

Almost all mono CAD — plans and sections on bond; colour is the exception

About 12 ml a month. Matte Black empties first, about 40× faster than your slowest channel.

Matte Black → 1×55 ml · lasts 5.5 months
Cyan → 1×55 ml · lasts over a year
Magenta → 1×55 ml · lasts over a year
Yellow → 1×55 ml · lasts over a year
Photo Black → 1×55 ml · lasts over a year

⚠ Cyan, Magenta, Yellow, Photo Black will pass the date before running out at this rate. Buy the smallest size sold and check the code on delivery.

Mono CAD plus some colour — mostly line work, with coloured services and the odd render

About 24 ml a month. Matte Black empties first, about 9× faster than your slowest channel.

Matte Black → 1×55 ml · lasts 4.1 months
Cyan → 1×55 ml · lasts 16.1 months
Magenta → 1×55 ml · lasts over a year
Yellow → 1×55 ml · lasts over a year
Photo Black → 1×55 ml · lasts over a year

⚠ Magenta, Yellow, Photo Black will pass the date before running out at this rate. Buy the smallest size sold and check the code on delivery.

Mixed CAD and presentation — drawings, site plans, renders and some boards

About 67 ml a month. Matte Black empties first, about 3× faster than your slowest channel.

Matte Black → 2×55 ml · lasts 2.7 months
Cyan → 1×55 ml · lasts 3.8 months
Magenta → 1×55 ml · lasts 4.3 months
Yellow → 1×55 ml · lasts 4.5 months
Photo Black → 1×55 ml · lasts 7.9 months
Mostly posters and graphics — full-colour output is the main job

About 239 ml a month. Cyan empties first, about 2× faster than your slowest channel.

Matte Black → 1×130 ml · lasts 5.0 months
Cyan → 1×330 ml · lasts 5.2 months
Magenta → 1×330 ml · lasts 5.7 months
Yellow → 1×330 ml · lasts 6.2 months
Photo Black → 1×130 ml · lasts 3.4 months
Photo and fine art — high-coverage work on gloss, canvas or backlit

About 366 ml a month. Cyan empties first, about 8× faster than your slowest channel.

Matte Black → 1×55 ml · lasts 4.2 months
Cyan → 1×330 ml · lasts 3.3 months
Magenta → 1×330 ml · lasts 3.5 months
Yellow → 1×330 ml · lasts 3.8 months
Photo Black → 1×330 ml · lasts 4.7 months
Steady — about 75 m² a month · ~150 A1 plots

Step 2. Now open the line that matches what you print.

Almost all mono CAD — plans and sections on bond; colour is the exception

About 35 ml a month. Matte Black empties first, about 40× faster than your slowest channel.

Matte Black → 1×130 ml · lasts 4.4 months
Cyan → 1×55 ml · lasts over a year
Magenta → 1×55 ml · lasts over a year
Yellow → 1×55 ml · lasts over a year
Photo Black → 1×55 ml · lasts over a year

⚠ Cyan, Magenta, Yellow, Photo Black will pass the date before running out at this rate. Buy the smallest size sold and check the code on delivery.

Mono CAD plus some colour — mostly line work, with coloured services and the odd render

About 72 ml a month. Matte Black empties first, about 9× faster than your slowest channel.

Matte Black → 1×130 ml · lasts 3.3 months
Cyan → 1×55 ml · lasts 5.4 months
Magenta → 1×55 ml · lasts 6.3 months
Yellow → 1×55 ml · lasts 6.5 months
Photo Black → 1×55 ml · lasts 12.5 months
Mixed CAD and presentation — drawings, site plans, renders and some boards

About 201 ml a month. Matte Black empties first, about 3× faster than your slowest channel.

Matte Black → 1×330 ml · lasts 5.4 months
Cyan → 1×130 ml · lasts 3.0 months
Magenta → 1×130 ml · lasts 3.4 months
Yellow → 1×130 ml · lasts 3.5 months
Photo Black → 2×55 ml · lasts 2.6 months
Mostly posters and graphics — full-colour output is the main job

About 716 ml a month. Cyan empties first, about 2× faster than your slowest channel.

Matte Black → 1×330 ml · lasts 4.2 months
Cyan → 1×700 ml · lasts 3.7 months
Magenta → 1×700 ml · lasts 4.0 months
Yellow → 1×700 ml · lasts 4.4 months
Photo Black → 2×330 ml · lasts 2.9 months
Photo and fine art — high-coverage work on gloss, canvas or backlit

About 1,098 ml a month. Cyan empties first, about 8× faster than your slowest channel.

Matte Black → 1×130 ml · lasts 3.3 months
Cyan → 2×700 ml · lasts 2.3 months
Magenta → 2×700 ml · lasts 2.5 months
Yellow → 2×700 ml · lasts 2.7 months
Photo Black → 1×700 ml · lasts 3.3 months
Busy — about 200 m² a month · ~400 A1 plots

Step 2. Now open the line that matches what you print.

Almost all mono CAD — plans and sections on bond; colour is the exception

About 94 ml a month. Matte Black empties first, about 40× faster than your slowest channel.

Matte Black → 1×330 ml · lasts 4.1 months
Cyan → 1×55 ml · lasts 11.0 months
Magenta → 1×55 ml · lasts 14.5 months
Yellow → 1×55 ml · lasts 15.6 months
Photo Black → 1×55 ml · lasts over a year

⚠ Photo Black will pass the date before running out at this rate. Buy the smallest size sold and check the code on delivery.

Mono CAD plus some colour — mostly line work, with coloured services and the odd render

About 191 ml a month. Matte Black empties first, about 9× faster than your slowest channel.

Matte Black → 1×330 ml · lasts 3.1 months
Cyan → 1×130 ml · lasts 4.8 months
Magenta → 1×130 ml · lasts 5.6 months
Yellow → 1×130 ml · lasts 5.7 months
Photo Black → 1×55 ml · lasts 4.7 months
Mixed CAD and presentation — drawings, site plans, renders and some boards

About 536 ml a month. Matte Black empties first, about 3× faster than your slowest channel.

Matte Black → 1×700 ml · lasts 4.3 months
Cyan → 2×330 ml · lasts 2.9 months
Magenta → 1×330 ml · lasts 3.2 months
Yellow → 1×330 ml · lasts 3.4 months
Photo Black → 1×330 ml · lasts 5.9 months
Mostly posters and graphics — full-colour output is the main job

About 1,908 ml a month. Cyan empties first, about 2× faster than your slowest channel.

Matte Black → 1×700 ml · lasts 3.3 months
Cyan → 3×700 ml · lasts 1.4 months
Magenta → 2×700 ml · lasts 1.5 months
Yellow → 2×700 ml · lasts 1.6 months
Photo Black → 2×700 ml · lasts 2.3 months
Photo and fine art — high-coverage work on gloss, canvas or backlit

About 2,927 ml a month. Cyan empties first, about 8× faster than your slowest channel.

Matte Black → 1×330 ml · lasts 3.1 months
Cyan → 4×700 ml · lasts under a month
Magenta → 4×700 ml · lasts under a month
Yellow → 3×700 ml · lasts 1.0 months
Photo Black → 3×700 ml · lasts 1.2 months
High volume — about 500 m² a month · ~1,000 A1 plots

Step 2. Now open the line that matches what you print.

Almost all mono CAD — plans and sections on bond; colour is the exception

About 235 ml a month. Matte Black empties first, about 40× faster than your slowest channel.

Matte Black → 1×700 ml · lasts 3.5 months
Cyan → 1×55 ml · lasts 4.4 months
Magenta → 1×55 ml · lasts 5.8 months
Yellow → 1×55 ml · lasts 6.2 months
Photo Black → 1×55 ml · lasts 11.1 months
Mono CAD plus some colour — mostly line work, with coloured services and the odd render

About 478 ml a month. Matte Black empties first, about 9× faster than your slowest channel.

Matte Black → 2×700 ml · lasts 2.6 months
Cyan → 1×330 ml · lasts 4.8 months
Magenta → 1×330 ml · lasts 5.7 months
Yellow → 1×330 ml · lasts 5.8 months
Photo Black → 1×130 ml · lasts 4.4 months
Mixed CAD and presentation — drawings, site plans, renders and some boards

About 1,339 ml a month. Matte Black empties first, about 3× faster than your slowest channel.

Matte Black → 2×700 ml · lasts 1.7 months
Cyan → 2×700 ml · lasts 2.4 months
Magenta → 2×700 ml · lasts 2.7 months
Yellow → 2×700 ml · lasts 2.9 months
Photo Black → 1×700 ml · lasts 5.0 months
Mostly posters and graphics — full-colour output is the main job

About 4,771 ml a month. Cyan empties first, about 2× faster than your slowest channel.

Matte Black → 3×700 ml · lasts 1.3 months
Cyan → 6×700 ml · lasts under a month
Magenta → 5×700 ml · lasts under a month
Yellow → 5×700 ml · lasts under a month
Photo Black → 4×700 ml · lasts under a month
Photo and fine art — high-coverage work on gloss, canvas or backlit

About 7,317 ml a month. Cyan empties first, about 8× faster than your slowest channel.

Matte Black → 2×700 ml · lasts 2.7 months
Cyan → 9×700 ml · lasts under a month
Magenta → 9×700 ml · lasts under a month
Yellow → 8×700 ml · lasts under a month
Photo Black → 7×700 ml · lasts under a month

3. Four things that quietly eat ink

Maintenance cycles
Printhead cleaning runs on a clock, not a page count. A plotter switched on every morning and used once a week spends ink on nothing at all. Budget 5–10% overhead on top of your print maths — more if the machine sits idle in a dusty or very dry room.
Black ink switching
Some printers carry one black slot and flush the line every time you move between matte and gloss media. Every switch costs ink and time. If your machine does this, batch jobs by media type. Machines that carry matte black and photo black simultaneously — including Canon's imagePROGRAF TM, TX and GP lines — avoid the penalty entirely.
The wrong quality mode
A higher quality setting means more passes and more ink laid down. On a photograph that buys you something. On a line drawing it buys you nothing you can see — the lines were already solid black. Set a sensible default in the driver and let people step up deliberately.
Reprints nobody logs
The plot that came out with the wrong revision. The one where the roll ran out at 80%. In most offices this is 5–15% of output and it never appears in anyone's estimate. If your actual consumption keeps beating your forecast, this is usually where it went.

4. Why a twelve-month buy is usually a bad buy

Bulk discounts are real, and on a high-volume machine they are the right call. But ink is a chemical product with a date on it, and the clock started at the factory — not on the day the box reached your store room.

18–24 months
Typical shelf life from the date of manufacture across the major brands
~6 months
Common guidance for using a tank once it has been opened or installed
3 months
A sensible buying horizon for most offices — long enough to get volume pricing, short enough to stay fresh

Expired ink is not just wasted money. Pigment can settle and thicken, and on a machine with a permanent or expensive printhead, that is a repair bill rather than a replacement tank. Manufacturers generally treat the use of out-of-date consumables as misuse, which puts warranty cover at risk. Check the date code when the delivery arrives, and rotate stock oldest-first.

5. The sixty-second checklist

1
How many square metres a month? Not how many prints. Count sheets by size and convert with the size ladder in part one.
2
Which tier is most of that work? Multiply by the ml/m² figure from part one. That is your monthly total ink.
3
Which single channel runs out first? Pull the ink-usage report off the machine — see part two. It has been counting all along.
4
Add 8–10% for maintenance and reprints. Every forecast that ignores this comes in short.
5
Buy three months, not twelve. Round the busy channel up to the next tank size; round the quiet ones down to the smallest.
6
One spare of the dominant channel only. A full spare set is insurance you pay for and rarely claim — unless you print daily and downtime is expensive.

Not sure which tier your work actually falls into?

Send us your monthly plot count, your usual sheet size and what you print on. We'll work out your real square metres, tell you which tank is emptying first, and quote the order that fits — not the one that looks tidy on a shelf.

Message us on WhatsApp →

Canon Platinum Partner · genuine ink with UAE warranty · Canon-trained engineers

Related reading

Notes

Figures are built from published wide-format coverage thresholds. Channel splits, media multipliers and maintenance overhead are indicative planning figures, not manufacturer specifications — your own machine’s ink-usage log is always the better number.

Back to Smart Savings

Leave a comment

This site is protected by hCaptcha and the hCaptcha Privacy Policy and Terms of Service apply.

You may also like

Blog post

Give your customers a summary of your blog post