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By Meenjet Application Engineering Team | October 27, 2026
Executive Summary
Secondary packaging carries critical traceability data: expiry dates, batch numbers, and QR codes. In the past, manufacturers had to choose between print-and-apply labels (high barcode quality, but high consumable cost and mechanical complexity) or large character marking (LCM, high speed for large text, but low resolution for 2D codes).
Inline thermal inkjet (TIJ) changes this dynamic. It is not just a replacement for labels or LCM. It is also a complement. Modern secondary packaging lines often combine inline TIJ with labels or LCM: using LCM for large human-readable dates, labels for guaranteed barcode grading on difficult surfaces, and TIJ for high-resolution QR codes and shrink wrap.
This guide explains both roles: when inline TIJ replaces the other two, and when it works alongside them.
???? For Packaging & Production Managers
Question | Answer |
Can inline TIJ replace labels? | Only if the customer accepts a printed 2D code on brown board without a white background. Test the barcode grade before committing. |
Can inline TIJ replace LCM? | Yes, when the application requires high-density 2D codes (QR, Data Matrix) instead of large text. |
When should I keep labels? | For recycled, dark, or glossy cartons where guaranteed barcode contrast is critical. |
When should I keep LCM? | For maximum line speed on large-format text (e.g., 50 mm dates) or when carton pitch is under 100 mm. |
Can I combine TIJ with labels or LCM on one line? | Yes. Many lines use LCM for large dates, TIJ for QR codes, and labels for difficult substrates. |
What does a hybrid line require? | A shared trigger signal (encoder/photocell) and a single data source to avoid duplicate or missing codes. |
Which Meenjet model fits a hybrid line? | MXPro. 1–4 print heads, up to 240 m/min, up to 1,200 DPI. |
Glossary:
Secondary packaging: Outer packaging used to group, protect, or ship products (cartons, shrink wrap, labels).
TIJ: Thermal Inkjet — ink is heated and ejected through a nozzle.
LCM: Large Character Marking — inkjet systems designed for printing large text and basic barcodes directly on cases.
Barcode grade: A standard (such as ISO/IEC 15415) that measures barcode readability for scanners.
Print & Apply: A system that prints a label and mechanically applies it to a package.
1. Why Secondary Packaging Is Different
Secondary packaging presents coding challenges that primary packaging does not.
Factor | Primary Packaging | Secondary Packaging |
Surface | Bottles, cans, pouches | Cartons, labels, shrink wrap |
Shape | Curved, small, irregular | Flat, large, multi-sided |
Environment | Wet, cold, high-speed filling | Dry, dusty, high-speed cartoning |
Code content | Date, batch, QR | Date, batch, QR, serialized data |
Reader | Consumer, scanner | Scanner, logistics system, MES |
Key insight: Secondary packaging is where traceability becomes visible to the supply chain. A missing or unreadable code on a carton can stop a shipment. This makes reliable coding a production requirement.
2. The Three Main Options: TIJ vs Labels vs LCM
Before deciding whether to replace or combine, it helps to see the trade-offs.
Factor | Inline TIJ | Print & Apply Labels | Large Character Marking (LCM) |
Consumables | Ink cartridges | Labels, ribbon | Ink cartridges |
Barcode quality | High (up to 1,200 DPI) | Excellent (constant white background) | Medium (struggles on porous/dark board) |
Mechanical complexity | Low (no moving parts) | High (applicator arm, sensors) | Low (no moving parts) |
Speed on tight-pitch lines | High | Limited by applicator cycle | Very high |
Recycled or glossy cartons | ???? Depends on ink | ✅ Best choice (guaranteed contrast) | ???? Poor contrast |
Shrink wrap | ✅ Good (solvent ink) | ???? Requires specialty labels | ???? Poor (ink doesn't adhere) |
Key insight: Labels win on barcode grading and difficult surfaces. LCM wins on raw speed for large text and very tight pitch. Inline TIJ sits in the middle: it prints high-resolution 2D codes directly on the package, without the mechanical complexity of a labeler or the low resolution of LCM.
3. Scenario A: Inline TIJ as an Alternative
In many cases, inline TIJ can replace one of the older methods entirely.
Replacing Labels for Standard Cartons
Pre-printed labels and print-and-apply systems add consumable costs and mechanical downtime. For standard brown cartons, inline TIJ can eliminate labels entirely.
Engineering boundary: This works only when the customer or logistics system accepts a printed 2D code on brown board without a white background. Direct printing on recycled or uneven corrugated can lower the ISO/IEC 15415 grade. If the system requires a guaranteed A-grade barcode, labels remain the safer choice.
Replacing LCM for 2D Codes
LCM is excellent for large dates like EXP 2027-10. But if the customer requires a high-density Data Matrix code for traceability, LCM may not achieve the required grade. Inline TIJ provides up to 1,200 DPI, producing a dense, readable code directly on the board.
Engineering boundary: For carton pitch under 100 mm, LCM's continuous print capability may still outperform TIJ's trigger response. LCM remains the better choice when large text speed is the priority and 2D code resolution is not required.
Replacing Both for Shrink Wrap
Labels struggle on shrinking film, and LCM ink often does not adhere. Inline TIJ with solvent ink is the most reliable direct-print method.
Engineering boundary: Shrink tunnels reach 150–200°C. Use a solvent ink rated for high temperature, and verify barcode readability after the tunnel. Heat and film shrinkage can distort the printed code.
4. Scenario B: Inline TIJ as a Complement
On complex lines, TIJ is not a replacement. It is a second or third tool that covers what the others cannot.
Hybrid Line: LCM for Dates, TIJ for QR Codes
A common setup: LCM prints the large human-readable date and batch number (fast, low cost per character), while inline TIJ prints the high-density Data Matrix or QR code (high resolution, required for scanning).
Hybrid Line: Labels for Difficult Surfaces, TIJ for Standard Ones
If a line produces both standard brown cartons and glossy retail cartons, the standard cartons can be coded with inline TIJ (no labels), while the glossy cartons continue to use labels. This reduces label consumption without compromising barcode grade on the difficult items.
Hybrid Line: TIJ as a Backup
Some lines keep a TIJ print head on standby to add serialized QR codes or secondary codes that the main labeler or LCM cannot produce on short notice.
Key insight: Combining two or three methods requires a shared trigger signal (encoder or photocell) and a single data source. Without this, duplicate or missing codes can occur. The integration cost is real, but it is often lower than the cost of replacing an entire existing system.
5. Meet the MXPro
While LCM and labels remain essential for specific scenarios, inline TIJ needs a print engine that can handle the hybrid demands of secondary packaging: high-resolution 2D codes, variable data, and fast line speeds.
The Meenjet MXPro is built for this role. It supports up to four print heads for wide-format coding, reaches line speeds up to 240 m/min, and delivers up to 1,200 DPI for dense QR and Data Matrix codes. It integrates directly with conveyor sensors, encoders, and MES systems, making it a practical fit for the "alternative" or "complement" roles described above.
For detailed technical specifications, please visit the MXPro product page.
6. Cost & Maintenance Reality
Inline TIJ has a low maintenance burden, but consumable cost depends on print coverage and ink type.
Ink Cost
Water-based ink: lower cost, suitable for cartons and paper labels.
Solvent ink: higher cost, required for shrink wrap and synthetic labels.
Cartridge yield depends on print height and DPI.
Maintenance
No wearing parts and no solvent handling.
Cartridge swaps take seconds.
Print head cleaning is minimal compared with CIJ.
Total Cost of Ownership
Factor | Inline TIJ | Labels | LCM |
Upfront cost | Moderate | High (applicator) | Moderate |
Consumables | Ink cartridges | Labels, ribbon | Ink cartridges |
Maintenance | Low | Medium (mechanical parts) | Low |
Downtime risk | Low | Medium | Low |
Best for | 2D codes, shrink wrap, high-speed | Guaranteed barcode grade | Large text, tight-pitch |
Rule of thumb: If the carton surface is difficult and barcode grading is critical, use labels. If the line needs large text at maximum speed or very tight pitch, consider LCM. If you need high-resolution 2D codes on cartons, labels, or shrink wrap without mechanical complexity, inline TIJ is the best fit. Many lines combine two or three of these methods.
Frequently Asked Questions (FAQ)
Q1: Can I use TIJ and labels on the same line?
A: Yes. A common setup uses labels for glossy or retail cartons and inline TIJ for standard brown cartons, reducing label consumption while maintaining barcode quality where it matters.
Q2: Can I use TIJ and LCM on the same line?
A: Yes. Some lines use LCM for large dates and batch numbers (fast, low cost per character) and TIJ for high-density 2D codes (high resolution, required for scanning).
Q3: When should I replace labels entirely with TIJ?
A: When the carton surface is standard brown board and the customer accepts a printed 2D code without a white background. Test the barcode grade before committing.
Q4: Does inline TIJ require daily maintenance?
A: No. Inline TIJ has no wearing parts and no solvent handling. Maintenance is limited to replacing cartridges and cleaning the print head when needed.
Q5: What is the minimum order for a free line audit?
A: No minimum. Send us your line details and substrate samples, and our engineers will recommend the right combination.
???? Request a Free Line Audit
Send us your line details. Our engineers will:
Review your line speed, substrate, and code requirements
Recommend the right combination of TIJ, labels, and LCM
Provide a cost and configuration proposal
No obligation. Report delivered within 5 business days.
???? Request a Free Line Audit
Related Technical Resources
Online TIJ vs CIJ vs Laser: Which for Cartons, Bottles, and Film?
How to Choose TIJ Printing Solutions for Packaging: An Efficiency & TCO Guide
CO₂ or Fiber Laser: Which Flying Laser Marker for High-Speed PET Lines?
About the Author
Meenjet Application Engineering Team — Over 15 years of combined field experience supporting inline TIJ, handheld TIJ, CIJ, and laser installations across packaging, logistics, and manufacturing.
Reviewed by: Senior Application Engineer, Meenjet
Last Updated: October 27, 2026