PIJ vs CIJ Printers: Which Industrial Coding Technology Is Right for Your Production Line?

Introduction

In the field of industrial marking and coding, we frequently encounter clients grappling with the same confusion when selecting printing system: “Should I choose PIJ (High resolution inkjet printer) or CIJ (Continuous inkjet printer)?”

While, the answer is “It depends on your coding needs”. Today we'll break down these two technologies in detail and conduct a thorough comparison from the perspectives of print quality, production line speed, daily maintenance, and overall cost.

What is a PIJ printer?

PIJ (Piezo Inkjet, piezoelectric inkjet) printer, also called high resolution inkjet printer, is a type of Drop-on-Demand (on-demand inkjet) technology.

In simple terms, PIJ (Piezo Inkjet, piezoelectric inkjet) is a type of Drop-on-Demand (on-demand inkjet) technology. Its core principle is to utilize piezoelectric crystals that undergo slight deformation under voltage drive. Just like milking a cow, it sprays out the exact amount of ink needed.

This ability for precise control has made PIJ synonymous with high-resolution printing. It not only excels in large character identification (large character capability), but is also the absolute leader in barcode and QR code printing. If you want to delve deeper into its internal mechanical structure, you can refer to the article we previously shared: "How Does Piezo Inkjet Technology Work?"

What is a CIJ printer?

The logic of CIJ (Continuous Inkjet) is "it just won't stop". Whether you print or not, the ink in the deflector plate is forming a continuous stream of ink droplets. The ink droplets that are not used to fly towards the product will be reabsorbed by the recycling system and recycled.

The inherent advantage of CIJ is its speed. It was designed for high-speed production coding. However, it is more inclined towards small character coding, and the printed text usually consists of distinct ink dots.

In the following typical applications that require high speed and complex environments, you will almost always see the presence of CIJ:

1. Beverage: The continuous and rapid assembly lines for bottling
2. Food: Date coding on soft packaging and puffed food bags
3. Cable: Meter markings on the high-speed extrusion production line
4. Pharmaceutical: Batch numbers on aluminum foil tablets and small medicine bottles

PIJ vs CIJ: Core Technology Comparison Table

Print quality: which technology delivers better resolution?

When it comes to high-resolution coding, piezo electronic inkjet printer holds a decisive advantage.

Piezo inkjet printing machine an easily printing resolution of 300 dpi or even 600 dpi. If you have the need for QR code printing or barcode printing systems, PIJ is almost the only option that can ensure that the scanning guns of retailers and supermarkets can "scan through" without any issues.

And what about CIJ? Its resolution is usually only a few dozen dpi. Although it is sufficient for printing dates, batch numbers and simple text, if you try to use CIJ to print complex QR codes, the image composed of individual dots is likely to cause the scanning devices to "go on strike" collectively.

Speed comparison: PIJ vs CIJ for high-speed production

However, when speed is a critical factor, CIJ begins to take the lead.

CIJ is the absolute king of ultra-high-speed production lines. At the terrifying flow rates of thousands of bottles per minute in beverage bottling, only CIJ can leave a clear ink mark on the bottom or neck of the bottle.

PIJ, while not slow either, is more suitable for medium-to-high-speed packaging lines, such as carton coding, secondary packaging, and label printing.

Ink and operating costs

In the long run, the total cost of ownership (TCO) is the key factor that determines which machine is more cost-effective.

The material utilization rate of PIJ is extremely high. Every drop of ink it sprays adheres to the product, with almost no ink wasted. Moreover, since no solvent (Makeup Fluid) is needed to maintain the ink viscosity, the overall post-production material cost is much lower. This is of great significance for many manufacturers who are concerned about VOCs.

The operating cost of CIJ is somewhat higher. Its working mechanism requires not only the consumption of ink but also the continuous use of diluent. Due to the continuous exposure of the ink, some of the solvents will naturally evaporate in the air, which inevitably increases the ongoing expenses.

Best applications for PIJ inkjet printing system

If you are dealing with the following products or have the following printing requirements, PIJ will be your reliable partner:

1. Corrugated Boxes and Various Cartons
2. Product labels (Labels) and flexible packaging
3. High-quality QR Codes, GS1 international standard barcodes (GS1 Codes)
4. Corporate logos and promotional printing materials

Best applications for CIJ inkjet printing system

However, if your production line falls into any of the following categories, CIJ is an indispensable standard equipment:

1. Beverage Bottles and Cans
2. Electric cables and plastic pipes
3. Electronic components (Electronics)
4. Ultra-high-speed packaging lines
5. Pure Expiry Date Coding and Batch Number Coding

Can Piezo inkjet printer and Continuous inkjet printer be used together?

The answer is “Yes”. In fact, for manufacturer with multi production lines, this is ideal coding and marking solution.

Based on our years of deep industry experience, PIJ and CIJ actually coexist and perfectly complement each other in many large-scale, modern factories.

Need help choosing between high resolution inkjet and continuous inkjet coder?

With over 10 years focusing on industrial coding and marking, We deeply understand clients’ factory’s production line layout, printing surface materials, and budge range are unique. Thus, why our sales team places greater emphasis on the initial communication with you. Only by thoroughly understanding your specific needs and detailed working conditions can we provide the best solution for you.

Whether you need high-resolution outer box carton printing, GS1 QR codes that comply with regulations, or date marking machines that can keep up with ultra-high-speed production lines, we can meet your requirements. Please feel free to contact our technical experts at any time. We will provide you with a free evaluation of the coding solution and sample prototyping tests. The actual results will help you make a decision!