The difference between CIJ and DOD inkjet printers

There are lots of companies that manufacture and sell industrial inkjets (Needham is amongst the best). It is important to know and understand the use and material you will be marking or coding before selecting one.

The two common types of industrial inkjet printers are known as ‘continuous inkjet’ and ‘drop on demand’. They are quite similar but also have some differences in how they operate and their uses.

CIJ

CIJ is one of the oldest inkjet technologies. It is still used on a large scale and favored by industrial companies. It is favored for its high production speed, reliability and flexibility.

Versatile uses

CJI can mark or code things such as date codes and barcodes. This can be printed on a variety of packaging materials such as such as metal glass wood plastic paper is ideal for marking almost any substrate.

This printing system allows the ink to drop at high velocity from multiple orientations onto a moving substrate which can be curved surfaces in multiple shapes and sizes.

High speed production:

This printing system allows the ink to drop at high velocity to achieve production at high speeds.

A reliability choice:

CJI printing systems can operate for thousands of hours without the need for any maintenance service. As a result, this lowers operational costs. Also because this printing method is a continuous process the heads rarely clog. These reasons make this system a reliable choice for companies allowing printing in high-pressure production environments.

What is DOD:

Similar to CJI DOD is a non – contact printer and is also used for industrial applications. However, it is better suited for more demanding industrial applications. However, it is not recommended for most retail packaging due to their lower printing resolution.

DOD is the broadest classification of inkjet printing technology and is commonly sub-categorized into thermal and piezo print heads.

Depending on the DOD system type it will either use thermal or piezo technology. In general

the DOD process will start by drops being formed by the creation of a pressure pulse in the ink reservoir. This causes valves open and close to form ink drops on demand drops are ejected through the nozzle according to the printing requirement.

The differences:

To summarize both of these methods are non-contact printers that can be used for industrial purposes. DOD tends to be used for more demanding industrial applications. The selection of DOD or CJI is largely down to the substrates you will be marking or coding. CIJ is suited to marking substrates such as metal glass wood plastic paper. Whereas DOD is suited to primary printing such as steel beams, various metals and plastics.

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