Different elements of the packaging can be subjected to a print inspection. In doing so, the systems check optical and physical aspects:
Is it legible? Technically sophisticated inspection systems are also able to check spelling and expression errors in several languages.
Are the graphic elements in the right place? Print inspection ensures that text elements, for example, are not obscured by graphics.
Has the correct colour code been inserted? Corporate colours in particular represent an important recognition value.
Print inspection includes 1D and 2D code checks. Defects such as an incorrect background or missing parts affect their readability.
Braille is produced with an embossing technique. Its depth is checked in optical print inspection. Particularly, pharmaceutical packaging requires absolute correctness.
- Punch contour and perforations
Do the sections match the cutting marks and perforations? The embossing and contours are also checked optically.
- Printed material
The final printed result can be subjected to a machine print inspection.
- Wipe and rub resistance
Are the colours permanently printed on the product?
Thanks to advanced print inspection systems, all elements can be tested in one process.
The production of printed products consists of different stages. A print inspection can be carried out at each individual stage of the process.
In the artwork production stage, subsequent errors are avoided by checking different documents against each other. A relevant advantage: deviations are already detected before the printing process. ProofText is a tried-and-tested checking system.
Files are also compared in this production stage: The artwork and the print document are compared with the aid of Proofiler Graphic, for example. Any discrepancies are then detected before plate production.
Print inspection takes place here in the printing process. Print samples in the form of multi-page documents and elements such as print images, codes, and Braille are compared with a reference file. This process is part of both quality assurance and production. A popular tool for scanner-based checking is the EyeC Proofiler.
In this section, spot checks of finished prints in production and finishing are common. ProofRunner performs the print inspection in this area.
Scanner-based inspection is also performed here with the Proofiler. The systems enable printers to carry out a full print inspection in order to be able to guarantee flawless deliveries.
Advantages of machine print inspection
A machine print inspection ensures reliable results throughout the print job. Printing problems are detected during production and can be corrected. This has decisive advantages:
- reduction of material waste
- avoidance of costly reprints and overproduction
- greater planning reliability
- better warranty for customers
- greater accuracy than the human eye
- traceability of defects through comprehensive inspection report and audit trailing
- better image and more customer satisfaction
- time saving due to the inspection of several parameters in one step