3 สิงหาคม 2018
The most common kind of offset printing is derived from the photo offset process, which
involves using light-sensitive chemicals and photographic techniques to transfer images
and type from original materials to printing plates. In current use, original materials may
be an actual photographic print and typeset text. However, it is more common—with the
prevalence of computers and digital images—that the source material exists only as data
in a digital publishing system.
Offset printing process consists of several parts:
* the inking system (ink fountain and ink rollers);
* the dampening system (water fountain and water rollers);
* the plate cylinder;
* the offset cylinder (or blanket cylinder);
* the impression cylinder.