It is true that it has many varieties and uses different techniques and materials (paint, paper).The main division is cold printing, where the paint is fixed by soaking into paper.
While the 'hot' offset where the printed paper web passes through the drying tunnel. The classic offset (water) is associated with the use of water rollers and hydrophilic and hydrophobic surfaces, however, this method is already abandoned due to the difficulty in obtaining a good balance of water and oil paint. The successor of this method is anhydrous offset printing where silicone molds are used instead of water.
That is why it is worth taking the equipment for service, because the fault can be trivial and inexpensive to repair.Even if we do not have a guarantee anymore, but our computer still performs well, it's worth servicing,
In this work, many things may go wrong: change of paper for another, new printer with other inks, incorrect conversion of colors.
There are also typo errors, bad placement of some element or just a few details.All this can end very badly and bring big losses - so it's work under stress and tension, because if something goes wrong it usually will be just for the DTP operator. .