How to Trial a TIJ Cartridge Before You Commit to a Supplier

A TIJ cartridge prints a clean code during a supplier demonstration, so the order looks like a formality. Three weeks later, on your own line, the first codes after every short stop come out incomplete, and the codes on coated cartons rub off at the case packer.

Nothing in the demonstration was dishonest. It was a different test. A bench has one substrate, one speed and an operator watching. Your line has a moving product, a contact path, a shift pattern, and a customer who has to accept the code.

That gap is where most cartridge disappointments are decided, and it is closed by trialling rather than by asking better questions. In thermal inkjet printing the cartridge carries both the ejecting surface and the ink, so a single swap changes two variables at once.

The eight steps below run in the order that saves the most time.

Confirm compatibility before you compare anything else

The cartridge has to fit the printer and suit its coding system before any ink question becomes relevant.

Compatibility is worth settling first because it is binary and cheap to check, while everything after it is a matter of degree.

Start with the printer model and the coding system it runs. TIJ cartridge compatibility is not a single property: the body has to seat correctly, the electrical interface on the contact face has to match, and the print width has to suit the job. Print width is a physical dimension of the cartridge rather than a software setting, so the difference between the two standard cartridge bodies only helps if the machine was built to carry the wider one. Whether a different body can be fitted is decided by the machine, not by the cartridge.

Industrial TIJ ink cartridges are supplied for a defined set of printer models and coding systems. Ask for that list in writing, rather than accepting a phrase such as “compatible with common TIJ printers”. A written list is checkable and a category is not. If your machine is not on it, that is information rather than a rejection, and it is cheaper to learn before the trial than during it.

Match the ink to the exact surface, not to the material name

The trial has to use finished packs, because two packages with the same material name can behave differently under the same ink.

Think of printing on a plastic pack as painting a slick door. The ink first has to spread across the surface, and then it has to stay there. “Plastic” on a purchasing sheet covers PE bags, BOPP wrappers, PET bottles and coated labels, and each one presents a different printing face. A code can look sharp as it leaves the printhead and still fail once the pack is rubbed, sealed, conveyed or scanned.

Two pouches both described as BOPP film may arrive with different coatings or surface treatments. Corona treatment raises surface energy to improve wetting, so it is worth asking the film supplier which side was treated, and then confirming which face actually receives the code. A dyne test can help diagnose a wetting problem, but it is a diagnostic rather than a substitute for printing with the proposed ink on the proposed material.

For the materials we see most often, our substrate matching guide works through that check face by face, and the plastic packaging selection sequence covers how to work backward from the finished pack.

When you request samples, send finished packs from the production batch rather than a generic sheet of material. State whether the code goes onto bare film, onto a coating or onto a preprinted area, and whether the pack flexes enough for the code to be repeatedly bent.

Write the trial protocol before you open the samples

A trial without a written protocol produces an opinion rather than a result.

The protocol is short, but writing it down changes what the trial can be used for. It turns “the code looked fine” into a record you can hold against a second candidate, and later against a repeat order.

Record the conditions you will hold constant: printer model and coding system, the settings you will not change during the trial, print resolution, code content and nominal print width, line speed, the material batch and the ambient conditions on the line. Then record the acceptance criteria before you see any results. Three are usually enough: what counts as a readable code, what handling the pack will undergo, and how many rejects are tolerable in a run.

Decide who inspects, and inspect the same way for every candidate. A trial where one ink is judged on a single sheet and another across a full shift is not a comparison.

Send the same protocol to every supplier you are trialling. Consistency is the point, and a supplier who can work inside your protocol has told you something about how the rest of the relationship is likely to go.

Test the failures that only appear over a longer run

An ink that prints well continuously can still fail after every stop, so the trial has to include idle periods.

Continuous printing is the easy case. The behaviour that decides whether a cartridge is tolerable on a real line shows up at the edges of a shift: the first codes after a short stop, the recovery after a longer pause, and the consistency of the last codes before the cartridge runs out. No bench demonstration substitutes for TIJ cartridge quality testing under the conditions the cartridge will actually meet.

Run the trial through at least one full shift rather than a short burst. Note the first code after 10 minutes idle, after 30 minutes, and after a meal break, and check whether the nozzles recover unaided or need a purge. Record interruptions and cleaning time separately from print defects, because they are different costs that land on different people.

Watch for drift as well. A cartridge that starts clean and degrades gradually across a shift produces a mixed pallet, and a mixed pallet is expensive to sort. If two candidates both print well but one needs attention every 40 minutes, that difference belongs in the cost comparison further down this article rather than in a footnote.

Verify the code, not just the print

The trial is not finished when the code looks right, it is finished when the code reads right.

A date code has to stay legible after normal handling, and a barcode also has to hold enough contrast for its intended scanner. Inspection by eye is not the same test as a scan, and it is the scan that your customer’s traceability printing process depends on.

If you print a GS1 DataMatrix code, verification by the applicable method matters more than how the code looks on a bench. GS1 describes contrast as the difference between light and dark areas as the scanner sees them, and points to ISO/IEC 15415 for DataMatrix print-quality testing. Our page on date and batch coding covers where these codes sit in a production line, and the GS1 Sunrise 2027 timeline explains why 2D codes are replacing linear barcodes at retail scanning points.

Test readability at the places the code will actually be scanned: after packing, after palletising, and after any storage or transport step that could abrade the surface.

Watch every point where a fresh code is touched

Most reports of a bad cartridge turn out to be a contact-path problem, and a trial is the cheapest place to discover that.

Drying is not an absolute property of an ink. It is the time available before something touches the code, and that time is a property of your line. Measure it rather than asking for a drying figure: the distance from the printhead to the first guide roller, the speed of the web or conveyor, and the angle at which the product is handled all change it.

Then look for the contact points that are easy to miss, including guide rollers, transfer belts, stacking surfaces, shrink tunnels, and the place where filled packs touch each other. On beverage and dairy lines, condensation after a cooling or rinsing step is a common reason a code smears despite printing correctly at the head.

If codes are rubbing off rather than printing badly, that normally points at the surface and ink pair rather than the printer. The diagnostic order we follow for adhesion failures separates the two before the trial turns into a round of cartridge swapping.

Do not compensate for a slow-drying ink by reducing line speed unless that is an acceptable production decision. Check the print location and the contact path first, because the same ink can clear on one machine and fail on the next with a different head placement.

Ask what the supplier does when a trial does not pass

The second purpose of a trial is to find out how a TIJ cartridge supplier behaves when the answer is not a sale.

A trial that passes tells you the cartridge works under your conditions. A trial that fails tells you something about the supplier, and that information is worth having before you are committed.

Watch how the questions come back. A supplier who asks for the material, the printer model, a photograph of the failed code and the line conditions is gathering what is needed to change something. A supplier who replies with a general statement that the cartridge performs well has not engaged with your result.

Ask what happens next in practical terms: who reads the sample, how quickly, and whether they can propose a different ink or a different setting rather than another cartridge. For the cartridges we fill ourselves, that conversation is the one described in how our cartridge factory is run, where the ink blending, filling, sealing and per-unit checking steps are set out. If you are still comparing suppliers at this stage, the seven questions worth putting to any supplier is the companion piece to this trial protocol.

Put a number on cost using what the trial produced

The comparable figure is cost per usable pack, not price per cartridge.

Price per cartridge is the easiest number to collect and the least informative. The trial you have just run produced the numbers that actually decide cost: how many packs were rejected, how many minutes the line stopped, how often the operator intervened, and how far one cartridge went.

Our pricing page explains how cartridge pricing works on this site, including the minimum order that applies to cartridges. Whatever the quoted price, the comparison that matters is the total across the run: cartridge cost plus rejects plus stoppage plus the operator time that nobody invoices.

That is the same argument as in why cartridge prices vary, reached from the other direction. That article starts from the quotation and asks what has to be made comparable. This one starts from the trial and asks what has to be measured.

A coated carton that passed on paper and failed on the line

A code that only has to survive a flat sheet has been tested under easier conditions than the one it will meet.

Consider a packaging company preparing to print batch codes on a new coated carton. Its first cartridge produces readable codes on a test sheet. During a longer run the marks become inconsistent, and the team initially suspects the printer.

After checking the setup and discussing the application, the team includes the carton surface and the operating conditions in the evaluation. Printing on the actual packaging and adjusting the setup identifies a more suitable option before full production begins.

This is an illustrative scenario built from a common failure pattern, not a report of measured results. The transferable lesson is that a demonstration on a substrate the supplier chose is not evidence about the substrate you run. The trial has to happen on finished packs, at production speed, through the handling the pack will actually meet.

The trial checklist in order

Eight steps, in the order that avoids repeating work. One planning note before you start: the cartridges we fill carry a minimum order of 160 units, so size a first order against the volume the trial justified rather than against the size of the sample.

1. Confirm compatibility. Get the printer models and coding systems the cartridge is supplied for, in writing, and check where the contact face and print width meet your machine.
2. Name the print surface. Identify the exact face being printed, including coatings and preprinted areas, then send finished packs from the current production batch.
3. Shortlist inks against that surface. Ask what information the supplier needs in order to recommend an option, and give it to them.
4. Write the protocol. Fix the settings, record the conditions, and agree the acceptance criteria before you see any results.
5. Run through a full shift. Include idle periods, note restart behaviour, and track interruptions separately from print defects.
6. Verify the code. Scan it rather than only looking at it, and test it again after the handling steps it will meet.
7. Map the contact path. Measure the time between the printhead and the first thing that touches the fresh code.
8. Decide with the numbers. Compare cost per usable pack, including rejects and stoppage rather than the quoted unit price alone.

Questions buyers ask about trialling a TIJ cartridge

How long should a cartridge trial run?

Long enough to contain at least one stop and one restart, which in most plants means a full shift rather than an hour. A short continuous run tests the cartridge at its easiest and tells you the least.

Can I trial a cartridge without ordering a full box?

Yes. Ask for samples against a defined application rather than sending a generic sample request, and describe your printer, material and code so the sample is worth testing. A minimum order of 160 cartridges applies to cartridge orders on this site, and it does not stand in the way of a trial. Cartridges bought here also carry a 30-day return window, so a first order does not have to be a final decision.

The sample passed but my production batch did not. What changed?

Usually the material or the conditions rather than the cartridge. Coatings, surface treatment, storage, ambient humidity and line speed all change how an ink behaves, which is why the trial should run on packs from the batch you will actually code.

Do I need to repeat the whole trial for every new batch?

No, but re-check the things that vary between batches: the print face of the material, code readability after handling, and restart behaviour. Keep the original protocol as the record so a later batch can be compared against it.

Is it worth trialling a cheaper cartridge at all?

Worth trialling, and worth measuring. A low price does not decide the outcome by itself, and it does not disqualify an option either. Trial it under the same protocol as the others and compare cost per usable pack, so the decision rests on evidence rather than on the quotation.

Choose the supplier who will run the trial with you

A TIJ cartridge is not chosen by reading a specification sheet. It is chosen by testing on your material, at your speed, through your handling, and by judging the result against the code your customer has to accept.

The supplier worth committing to is the one that will work inside that process. XinmoJet is one company you can learn more about as part of your supplier research. Share your printer model, material and code requirements with us, and ask for a sample that matches your application. Standard orders ship within 3 working days of payment, so a trial decision does not have to wait on a long lead time; you can reach us here with the pack in hand, and we will tell you honestly whether the issue is the cartridge, the surface, or neither.