Digital Printing Tips (1)

Digital printing is a printing technique that uses digital information instead of traditional analog information to transfer digital image information directly to a substrate.

We generally divide digital printing into Ctpress (or DI) and variable image digital presses.

On-machine imaging printing: It is the process of making the plates directly on the printing press, omitting the intermediate steps (imposition, filming, printing, and loading). From the computer to the printing press is a direct process.

Heidelberg's DI46-4

The first DI printing press recognized is the Heidelberg GTO-DI, which uses laser ablation to remove the silicon layer of the graphic part to obtain the ink-receptive layer (this process is done directly on the press), after a printing It is a waterless offset press by rolling in the new version by inserting two “prints” placed inside the drum into the reject.

Man-Roland's DICO-Web

DICO-Web (the so-called DICO is the acronym for Digital Change Over in English) also belongs to this type of printing press. It is a reversible printing plate cylinder device that Roland introduced at DRUPA 2000. This technology is called A revolution in the printing industry, it uses laser-induced thermal imaging heads to transfer graphic elements on the plate cylinder (the ink-receptive layer) by transferring the color material on the "color conveyor belt". After one printing, the graphic part can be washed out, and then the next imaging and printing (this process can be repeated approximately 200 times, and then replaced with a new seamless copper sleeve).

In addition, Agfa is also testing a non-developed coating for use in thermal laser imaging, where the blank is removed by the ink path.

Since the in-process image printing technology eliminates many intermediate steps, it also reduces many unnecessary losses in the process of information transmission, and can more accurately complete the copying of images and texts than the conventional analog printing forms, and does not have to be performed during the operation. Replacing printing plates also eliminates the need for school printing, which greatly speeds up the replacement of print jobs and increases work efficiency (especially in short-run printing).

Variable data printing: Variable data printing refers to the graphics (ie, data) that need to be changed during the continuous printing process when the Printing Machine is not stopped. That is, the printing process can be performed without interruption. Continuous printing of different print graphic.

Electrophotography:

In the past, electrophotographic technology, which was mainly used for copying, has been widely used in the printing field. Below we briefly explain the working principle of this type of printing press by introducing several Digital Printing Press brands that are technically representative:

Xeikon:

It provides the core of the printing for Agfa's Chromapress, IBM's InfoColor, Xerox's DocuColor, Dilpeter's DL 3300, and Man Roland's DICO series of digital presses. Its basic principle is to use light emitting diodes to form a latent image on a charged photoconductive drum. And make the toner on the plate adsorption, and then transferred to the paper, and finally to the paper to 140 °C high temperature to melt the toner, so that the toner fixed on the paper. This process is somewhat similar to the traditional copier.

Indigo

Compared with other types of variable data printers, the Indigo digital press is more like an offset press because it uses the rubber roller to indirectly transfer the ink on the plate to the paper.

It features a unique electronic ink and 100% ink transfer during the printing process. For this reason, it is also possible to print multi-color prints using only one photoconductor drum (some similar to a traditional plate cylinder) (ie, the first print of the same paper is black on the machine, and then it can be printed.) Blue, this process is continuous). Their Publisher 8000 is known as the world's highest performance digital press.

Due to many aspects of sales, Indigo has been acquired by HP, so the brand we can now see in the market is “HP Indigo”.

Paper Cutter

Paper Cutter,Paper Trimmer ,Paper Guillotine ,Paper Cutting Machine

Screen Printer Co., Ltd. , http://www.china-printing-machine.com