With the printing machine e.g. the deviation of the registers or streaking plays an important roe in the quality evaluation. The printing machine certification in accordance with the technical guidelines is in the available kind not suitable for the acceptance of sheet-fed press and web offset press, since it does not have the function of detection about the exclusion of the influence parameters. The certification according to ISO 12647-2 opens however the possibility to printing companies to record the confirmation that the certified printing machine represents a quality and an economy warranty. Fast print proof means less paper maculation, optimal machine condition, permits optimal production in narrow tolerances. The extension of the evaluation is therefore necessary for a printing machine certification and sets target values, which can be required from all printing machine manufacturers, without being dependent on their agreement. The certification is rationalized in such a manner with the fact that an evaluation of the compliance fulfillment can be obtained on the same day. The printing machine must be subjected to a biennial official verification just as any other machine.

The certification of a printing machine is to be seen as a condition for a PSO certification, can however independently of this be requested.

Only the printing machines, not however the serving employees are controlled. Their qualification must be presupposed.

The presentation of a compliance certificate with the national-usual safety regulations is essential. 

A maintenance and a repair confirmation must give information about the maintenance of the printing machine and its aggregates. 

At each machine a certified scan-color or density measuring device must be present.

The following paramters are controlled and measured:

• Standard register deviation over 4 printing units
• Positioning: print start / print middle
• Feed register
• Print number print proof to the passed for press
• Dot gain
• Slur and doubling
• Streaking with the 80% register
• Gradual fading
• Spreading of the VT over 100 sequential prints