CIJ vs TIJ: Which Inkjet Coding Technology Fits Your Production Line?

Same Goal, Very Different Machines

Continuous inkjet (CIJ) and thermal inkjet (TIJ) are the two workhorses of product coding. Both print dates, batch numbers, barcodes, and logos directly onto products and packaging — no labels, no contact, no dies. On a distributor’s spec sheet they can look interchangeable. On the factory floor, they are built around completely different physics, and that difference decides which one will run your line profitably.

Put simply: CIJ is the marathon runner for fast, non-stop lines and tricky surfaces; TIJ is the precision sprinter that prints sharper codes with almost zero maintenance, on friendlier substrates. Here is how to tell which one your application actually needs.

How Each One Works (in 30 Seconds)

CIJ pumps ink continuously through a tiny nozzle (50–70 μm) at high pressure. An electrostatic charge splits the stream into droplets; charged droplets are deflected onto the product, while uncharged ones recirculate through a closed ink system. Because the ink is solvent-based (MEK, ethanol, or acetone families), it flashes dry in about a second on almost any surface — glass, plastic, metal, film, cable. The trade-off is a living ink system: viscosity control, makeup solvent, and scheduled maintenance.

TIJ borrows the engine of your office inkjet: a sealed cartridge (typically HP45-class) where a micro-heater vaporizes a micro-layer of ink, firing a droplet through each of the cartridge’s nozzles — hundreds of times finer than a CIJ nozzle. Ink only fires when the controller says so. There is no ink to circulate, no solvent to top up, and when the cartridge runs out you swap it in seconds. The trade-off is a short print throw (the head must sit close to the surface) and inks that are pickier about what they stick to.

Quick Comparison

Figures are typical industry ranges; exact values vary by manufacturer, printhead type, and ink chemistry.

Where CIJ Wins

CIJ’s superpower is printing a durable, fast-drying code on almost any surface, at line speeds nothing else matches. The solvent inks bite into glass, PET, HDPE, aluminium, and flexible film, and the printhead tolerates real-world mounting where the surface wanders a few millimetres. On a bottling or canning line running tens of thousands of units per hour, a modern CIJ starts up automatically, manages its own viscosity, and prints millions of codes between services — which is why beverage, dairy, and extrusion plants still standardize on it. At high volumes, its ink-and-solvent cost per code is also the lowest of any direct-print technology.

Where TIJ Wins

TIJ’s superpower is print quality with zero fuss. At 300–600 dpi, TIJ produces text, logos, barcodes, and QR codes that look typeset — scan-grade by default, no nozzle tuning. Operationally it barely exists in your maintenance plan: the ink lives in a sealed cartridge, there is no makeup solvent, no viscosity system, and a changeover is a five-second click. That makes TIJ the natural choice for porous packaging (corrugated cases, cartons, paper, wood, eggs), for food-adjacent and clean production areas where solvent fumes are unwelcome, and for short or variable runs where a CIJ would sit idle more than it prints. Entry cost is also far lower, and handheld TIJ units let one operator code pallets and pipe stock on the fly.

The Real Cost Math

Purchase price is the smallest number in this decision. CIJ costs more upfront and carries service-plan and makeup-solvent overhead, but its fluid cost per code is tiny and amortizes beautifully across millions of prints. TIJ flips the curve: cheap to buy, effortless to run, but every cartridge has a finite volume, so at high volumes the per-print cost can exceed CIJ several times over. A useful rule of thumb: if a single line codes more than roughly a few million products a year, run the numbers on CIJ; below that, TIJ’s simplicity usually wins on total cost of ownership once you price in saved maintenance hours and avoided downtime.

Be Honest About the Limits

• CIJ needs a maintenance rhythm: filters, nozzles, and ink-system service on schedule, and a proper shutdown procedure for long stops. Solvent vapors demand ventilation, and print resolution is functional rather than beautiful — fine for date codes, less ideal for marketing-grade graphics.
• TIJ must sit close to the surface (typically 1–3 mm), which complicates mounting on uneven or wandering product. Water-based inks soak beautifully into cardboard but sit on top of plastics; solvent cartridges fix adhesion but reintroduce some handling precautions. Cartridges also have shelf lives — a printer parked for a year may need fresh ink before its first code. And on the fastest primary lines, TIJ top speeds fall short of CIJ.

Five Questions That Decide It

1. What surface? Non-porous, curved, or flexible (glass, PET, metal, film, cable) → CIJ. Porous (paper, board, wood, eggs) → TIJ.
2. How fast is the line? High-speed primary production → CIJ. Packaging halls, case coding, end-of-line → TIJ.
3. What are you printing? Simple date/lot codes → both fine. Scan-critical barcodes, QR, logos, small legal text → TIJ’s resolution advantage.
4. What volume? Millions+ per line per year → CIJ economics. Short, mixed, or seasonal runs → TIJ.
5. Who maintains it? Dedicated line technicians and a service plan → CIJ runs happily. No maintenance culture on site → TIJ removes the risk entirely.

Typical Applications at a Glance

Bottom Line

CIJ and TIJ are not rivals so much as specialists. If your question is “how do I code millions of slippery products at line speed,” CIJ is still the answer. If your question is “how do I print beautiful, scan-grade codes on packaging without a maintenance plan,” TIJ is the answer. Many growing plants end up running both — CIJ on the primary line, TIJ on packaging and end-of-line — and each pays for itself in its own lane. Match the technology to the substrate, the speed, and the volume, and the decision makes itself.