Printing according to the standard

Quality that withstands comparison

We always comply with standards. The ISO standard. Standardisation in newsprint by ISO 12647-3 is fundamentally used for the purpose of correct, process-optimised colour communication from the draft to the printed end product.

The international series of standards ISO 12647-3 and the tools and applications developed from this enable reliable solutions that have been tried in practice for all sub-processes.

A predictable and reproducible colour result.
This means that the print provides the expected result and repeated subjects look the same even with a new print order.

TECHNICAL INFORMATION
The proof
We print for you in binding colours

With four-colour newspaper print, the colours are determined by printing certain colour values of the coloured printing colours and black over one another. The data record produced in this way generates the required colour in standardised print. This means that e.g. a colour envisaged as grey in the pre-stage also appears grey in the printed end product. In this case, a correct colour scheme is given.

If the ratio (application of colour) of the four colours to one another is not preserved in a transfer step, the colour balance is disrupted and a colour cast develops. This can become unattractive. Using three colour application rollers, it is ensured that always the colour quantity required at that time is available in the system of the print machine.

In addition, our printers constantly keep an eye on the colour impression of the newspaper.

Soft proof
Our soft proof system serves to depict colour data on a control screen. In this way, it is simulated how these will appear on the selected print paper.

What does that mean for the print? As a result of the soft proof, our employees know exactly what colour impression is required by the customer and it is ensured that this is also reached.

The plate exposure
At our company, the plate exposure is done in a purely digital form – i.e. the digital file is exposed directly onto the plate (CtP = Computer to Plate). For this purpose, diodes generate a violet ray of light (405 nm wavelength) that writes the ink-carrying elements required in print onto the photo polymer print plate. In this process, the polymers are therefore hardened in the ink-carrying layer through cross-linking under light influence.

A major benefit of this system is the low energy required by the diodes which only have an output of 60 mW. The exposure of the plates is done with a resolution of 1,270 dots per inch. This fineness of exposure is ideally tailored to the screening required in the print process. Top quality can only be generated in the perfect interaction between these two parameters.

Set-up precision
The colour newspaper is achieved in print by printing the colours cyan, magenta, yellow and black over one another. So that these colours can also be printed over one another with 100% precision, the print plates have to be processed very precisely. So that the print plates can be attached to the cylinders of the printing machine, they have to be stamped and folded. The stamping is used for the exact positioning of the plates on the print cylinder using dowel pins and the folding of the receptacle using tensioning rails in the cylinder.

The alignment of the plates during manufacture is done under video surveillance. For this purpose, the plate is aligned with a speed of 0.005 mm (human hair has a diameter that is ten times greater). If this tolerance is exceeded, the plate will be automatically recognised as harmful, channelled out of the process and the production of a new plate initiated.

Automatic plate sorting
For a tabloid product of 48 pages, 96 plates (48 pages; 2 pages x 4 colours fit on one plate) are required for the print. We sort our plates fully automatically so that there is no confusion, either within the product or with third-party products. The print plates produced (exposed, stamped, folded) contain a 2D barcode in which all the relevant information (date of publication, product, page, colour, version). This is recorded via a barcode scanner and the plate is filed in a fully automatic buffer system incorporating 450 plates. An individual storage place is assigned to each print plate. Removal from the storage place is software-controlled. The plates are issued in an order that facilitates an optimum and error-free process for lifting into the printing machine.

The buffer/sorting machine works with a speed of 450 plates per hour (storage and removal are done in parallel). In total, 36 compartments each with 32 plates are available in our plate production for accommodating sorted plates. This is a capacity of 1,152 sorted print plates.

STARCLUB
We reached for the stars and got one.