CIJ vs. TIJ vs. Laser Marking: Which Coding Technology Fits Your Line?
Most coding technology decisions are made backwards. A manufacturer decides they want laser because it sounds permanent and modern or sticks with continuous inkjet because that's what the last line used - and then discovers the substrate, the line speed, or the operating cost doesn't cooperate.
The better starting point is the product itself. What are you printing on, how fast is it moving, how long does the code need to survive, and who must maintain the machine at 2 a.m.? Answer those four, and the technology usually picks itself.
This guide compares continuous inkjet (CIJ), thermal inkjet (TIJ), and laser marking on terms that determine the outcome, and is honest about where each is the wrong answer.
1. The Three Technologies, Briefly
Continuous inkjet (CIJ)
A pump pressurizes a mixed ink-and-makeup stream through a nozzle, breaking it into droplets. The droplets are electrostatically charged and deflected onto the product; the ones not used are recirculated back to the reservoir. That recirculation is why CIJ can run around the clock, and why it copes with curved, moving, and awkward surfaces — the printhead never touches the product and can fire from up to about 10 mm away.
Thermal inkjet (TIJ)
A resistor heats the ink until a vapour bubble forms, forcing a droplet out of the nozzle. The printhead is part of the cartridge, so replacing the cartridge replaces the wear parts, which is the whole appeal. There is no pump, no solvent reservoir, and no fluid system to maintain.
Laser marking
A focused beam alters the surface itself — ablating a coating to reveal contrast underneath, causing a colour change in a plastic's chemistry, or forming micro-cracks in glass. Nothing is deposited on the product, so there is nothing to smear, rub off, or dry. The mark is the material.
2. Start With the Substrate — It Eliminates More Options Than Anything Else
This is the single most useful distinction in this guide, and the one most comparisons skip. CIJ and TIJ are not simply "high speed" versus "high resolution." They differ chemically, and that difference decides where each can print.
CIJ uses solvent-based inks. The solvent carrier flashes off fast and binds to the surface, which gives CIJ strong adhesion on non-porous materials — PET bottles, glass, aluminum, coated metals, shrink sleeves, flexible films, cable and conduit. This is why beverage, wet-environment, and industrial lines default to CIJ.
TIJ was traditionally water-based, which made it excellent on porous substrates — corrugated, kraft, uncoated cartons, paper labels — and poor on anything glossy or sealed, where the ink beads instead of binding. That limitation has narrowed: solvent-based and pigmented TIJ cartridges now print on many non-porous surfaces. But the rule of thumb still holds. If your substrate is porous, TIJ is usually the cleaner answer. If it's non-porous and running fast in a wet or dusty plant, CIJ still earns its keep.
Laser is a different question entirely, because the laser type matters more than the fact that it's a laser:
- CO₂ (10,600 / 10,200 / 9,300 nm) — coated card, paper, glass, many plastics. It will not mark bare metal without a marking additive, because the wavelength is poorly absorbed.
- Fibre (1064 nm) — metals, and many but not all plastics. The workhorse for permanent part marking.
- UV (355 nm) — “cold” marking for heat-sensitive plastics and delicate substrates, and the finest achievable spot sizes.
If you are unsure how your material will respond, get a sample marked before you commit. A laser that can't hold the required code grade on your specific resin is an expensive way to learn this.
3. Speed: Ask About Your Code, Not Just Your Line
"Which is fastest" is the wrong question, because the three technologies are limited by different things.
CIJ is genuinely built for speed and is the default on fast-moving beverage and consumer-goods lines. Recirculation lets it run continuously through multi-shift operation.
TIJ handles low- to mid-speed lines comfortably and increasingly reaches into higher speeds, but throughput trades against print height and resolution.
Laser speed depends almost entirely on the code. A laser marks by tracing — so a four-character date code and a full 2D DataMatrix with serialized data are not remotely the same job. Line speed, pitch between products, code content, and field size together determine whether a given laser configuration keeps up. This is why "lasers are fast" is close to meaningless without the code spec attached.
4. Durability and Permanence
Laser marks are part of the substrate, so they survive chemicals, abrasion, moisture, and washdown in a way ink cannot. Where a code must last the life of the product — automotive and aerospace parts, medical devices, electronics, tools — laser is usually the honest answer.
CIJ and TIJ depend on ink adhesion, which means durability is a function of ink formulation matched to substrate, not of the printer. A well-specified solvent CIJ code on PET is far more robust than a poorly matched TIJ code on the same bottle. Get the ink specification right and inkjet durability is rarely the binding constraint for packaging that gets consumed within its shelf life.
One caveat rarely mentioned: laser marking applies thermal stress to the part. Used improperly on a thin or sensitive component, it can compromise integrity — which is precisely why UV exists.
5. Side-by-Side Comparison
| Feature | Continuous Inkjet (CIJ) | Thermal Inkjet (TIJ) | Laser Marking |
|---|---|---|---|
| Best Substrates | Non-porous — PET, glass, metal, films, cable | Porous — corrugated, cartons, labels, paper (solvent inks extend to some non-porous) | Depends on laser type — metals (fiber), coated card/glass/plastics (CO₂), heat-sensitive (UV) |
| Print Resolution | Moderate — built for speed over detail | High — sharp text, logos, scannable barcodes | Very high, highly consistent |
| Speed Profile | Excellent on fast, continuous lines | Good on low-to-mid speed; trades against print height | Depends on code content and field size |
| Mark Permanence | Ink adhesion — formulation dependent | Ink adhesion — formulation dependent | Permanent, tamper-resistant |
| Consumables | Ink + makeup solvent (evaporation and flushing add consumption) | Cartridges only — printhead replaced with cartridge | No inks or solvents; fume filters and lens cleaning still required |
| Maintenance | Scheduled — viscosity, solvent levels, cleaning | Minimal — swap the cartridge | Lens wipe every 4–6 weeks; filter checks |
| Environment | Rugged — handles wet, dusty, harsh plants | Prefers clean, stable conditions | Requires beam shielding and fume extraction |
| Upfront Cost | Moderate | Low | High |
| Operating Cost | Higher (ink + solvent) | Moderate (cartridges) | Low |
6. Total Cost of Ownership: Where the Real Money Is
Purchase price is the least interesting number in this decision.
CIJ carries the most complex consumable picture. You are buying ink and makeup solvent, and the solvent is consumed not only by printing but by evaporation and flushing cycles. Viscosity and solvent levels are measured and maintained as part of normal operation, which also means the machine assumes someone competent is looking after it.
A common false economy is comparing CIJ ink cost per litre against TIJ cartridge cost per litre. The relevant comparison is cost per code, at your code size, at your volume — the answer flips depending on where you sit.
TIJ is the simplest: cartridges are the only recurring cost, and because the printhead ships with the cartridge, there's no separate wear-part schedule. This is why TIJ often wins on low- to mid-volume lines where no one on shift wants to be a fluids technician.
Laser has the highest entry price and the lowest running cost — but "zero consumables" is marketing, not accounting. Fume extractor filters are replaced periodically (more often in dusty plants), and the focusing lens needs a wipe every few weeks. Budget also for the fume extractor and beam shielding themselves, which are safety requirements rather than options. Against that, a fibre source can run on the order of 100,000 hours, and industrial laser systems commonly last seven years or more.
The honest summary: laser wins TCO at high volume over a long horizon; TIJ wins at low volume and low complexity; CIJ wins when the substrate and speed leave you no other option — and on the right line, that's a perfectly good reason.
7. Choosing: A Practical Decision Path
Choose CIJ when
- You are printing on non-porous substrates — PET, glass, metal, film
- Line speeds are high and continuous, across multiple shifts
- Products are curved, irregular, or moving fast
- The environment is wet, dusty, or otherwise harsh
- You have maintenance staff comfortable with fluid systems
Choose TIJ when
- You are coding porous substrates — cartons, corrugated, labels
- High-resolution barcodes and 2D codes are the priority
- Maintenance simplicity matters more than raw speed
- You want clean operation with no solvent handling
- Volumes are low to moderate, or products change frequently
Choose laser when
- The code must be permanent and tamper-resistant
- Long-term traceability or authentication is a regulatory requirement
- Consumable cost and downtime must be minimized over a long equipment life
- Products face harsh environments, washdown, or chemical exposure
- You have confirmed — with a sample mark — that your substrate responds to the available laser type
And a note worth stating plainly: plenty of plants run more than one. A single site might use CIJ on the bottling line, TIJ on the case coder at the end of it, and laser on a component that has to survive a decade in the field. These are not competing religions — they are tools with different jobs.
8. Where Coding Is Heading: 2D Codes and GS1 Sunrise 2027
The most consequential shift in coding right now isn't a new printer — it's what the code has to contain.
The GS1 Sunrise 2027 initiative sets a target for retail point-of-sale systems to be able to read and process the GTIN from both traditional linear barcodes and 2D barcodes (QR codes with GS1 standards, or GS1 DataMatrix) by the end of 2027. It is an industry ambition rather than a legal mandate — linear barcodes will continue to be accepted, and during the transition a product carrying a 2D code still needs its linear barcode alongside it. But the direction is set, and pilots are already running in dozens of countries.
For coding equipment, this matters in a specific way: 2D codes demand more of the marking system than a date code ever did. A DataMatrix has to hold its grade — every module crisp, adequate contrast, correct quiet zone — on your actual substrate at your actual line speed. A code that looks fine to the eye can still fail verification. Practically:
- Resolution stops being a nice-to-have. A printer adequate for a legible date code may not hold a scannable 2D code.
- Variable data volume goes up — batch, expiry, and increasingly serialization, all in one symbol.
- Verification moves from optional to expected, particularly where retailer compliance or traceability audits apply.
All three technologies can produce GS1-compliant 2D codes. The question is whether your configuration holds grade on your substrate — which is a testing question, not a brochure question. If you are specifying equipment in 2026 with a seven-year life ahead of it, this is the thing to pressure-test now rather than in 2028. It applies just as much downstream at end-of-line, where pallet and case labels carry the same GS1 requirements.
Not Sure Which Fits Your Line?
Redemac supplies continuous inkjet, thermal inkjet, and laser marking systems — which means we have no reason to talk you into one over another. The right answer comes from your substrate, your line speed, your code content, and who maintains the equipment.
Our technical team will review your application, run sample marks on your actual material where needed, and help you spec a system that holds up — backed by certified service across Quebec and Ontario.
Talk to our technical teamFAQs
What is the difference between CIJ and TIJ printing?
CIJ pressurizes and recirculates a solvent-based ink stream, deflecting charged droplets onto the product — which suits high speeds and non-porous surfaces like PET, glass, and metal. TIJ heats ink in a cartridge to fire droplets on demand, giving higher resolution with almost no maintenance, and works best on porous substrates like cartons and labels, though solvent-based cartridges now extend it to some non-porous surfaces.
Which is better: CIJ, TIJ, or laser marking?
None of them, in the abstract. Start with your substrate — it eliminates more options than any other factor. Then check line speed against your actual code content, then durability requirements, then total cost of ownership at your volume. Many plants run all three for different jobs.
Is laser marking more cost-effective than inkjet?
Over a long horizon at high volume, usually yes — a fibre source can run on the order of 100,000 hours, and there are no inks or solvents. But the upfront cost is significantly higher, and "no consumables" isn't strictly true: fume extractor filters need periodic replacement and the lens needs cleaning every few weeks. At low volume, the payback may never arrive.
What materials can laser marking handle?
It depends on the laser type more than on laser marking as a category. Fibre lasers mark metals and many plastics; CO₂ handles coated card, paper, glass, and many plastics but cannot mark bare metal without a marking additive; UV suits heat-sensitive materials. If you're unsure how your material responds, have a sample marked before committing.
Which coding technology is best for food and beverage?
It splits by packaging format rather than by industry. Non-porous primary packaging running fast — bottles, cans, films — typically points to CIJ. Secondary packaging like corrugated cases and cartons typically points to TIJ. Laser appears where permanence matters or where consumable handling near food is undesirable. Many food plants run CIJ on the filling line and TIJ on the case coder at the end of it.
Do these technologies handle GS1 2D barcodes and Sunrise 2027?
All three can produce GS1-compliant 2D codes. The real question is whether a given configuration holds the required grade on your specific substrate at your line speed — 2D codes are far less forgiving than date codes. If you're specifying equipment now, test it against your material rather than trusting a spec sheet.
