Offset printing is still the most cost-effective and most commonly used printing method. During this printing process there is no direct contact between the printing form and the printing form carrier. At Orbo we use offset for a wide variety of applications such as flexible packaging in the food industry.
Ink and water: the basic elements of offset printing in a nutshell.
Why choose offset printing? Here are the many benefits:
The printing ink is transferred from the printing plate by inking rollers and printing blanket to the printing surface. Why a printing blanket? It deals with the unevenness of the surface to be printed and results in even printing.
The printing plates are made of rolled aluminium on which the print image is highlighted. One printing unit is needed per colour. Every offset press consists of one or more printing units arranged in a row.
Each printing unit transfers a colour to the printing foil and consists of the following parts:
In each printing unit the printing blanket transfers the image to the foil to be printed.
That offset plate is mounted around the plate cylinder of each printing unit. That plate has both hygroscopic and hydrophobic areas.
We first moisten the printing form with water. The hygroscopic are of the foil plate attracts that water. Then the inking device transfers ink to the plate which is hydrophobic and only affixes to the printing form in areas without water. That inked printing form rotates against the printing blanket cylinder and the ink is attached to the printing blanket. This printing blanket moves over the printing foil and transfers the ink to the material to be printed.
At Orbo we work with Electron Beam (EB)-inks for offset printing. These inks guarantee fast and complete curing. This is because certain ink parts react to a beam of high-energy-electrons.
The EB-curing is a reaction of a polymerisation process that can be compared with the process in uv- or led inks but they do not need photo-initiators. This is why EB-inks are cheaper, safer, more stable, reliable and odourless.
Therefore Orbo chooses the EB-printing process. The curing is more complete, produces less heat and allows printing on very thin foils.
In search of the most suitable food packaging? We recommend offset printing with E-beam-curing.
This is how it works:
Do you rely on E-beam-offset printing techniques? Then you do not only choose the most cost-effective form of printing with the most applications. This is also respecting the environment: