Graphic Design & Printing TechnologyUnit - 3
Modern Finishing Operations.....................................................
Introduction
After printing the product needs further operations to be finished. The two
most common types of classifications are finishing and binding. In the previous
unit we have learnt about the binding operations. In this unit, we study about
all other operations that enhance the appearence of the printed product.
Learning Outcomes
The learner:
- understands and demonstrate the operation of a paper cutting machine.
- categorises folding operations.
- understands other finishing operations.
- lists out various methods of binding.
Finishing
Finishing is the term used to describe all operations performed on a printed
material which include cutting, folding, slitting, perforation, scoring, die cutting,
embossing, foil stamping, numbering, laminating, drilling, varnishing etc. One
or more finishing operations are done on many jobs. The equipment used to
perform these operations may either be automatic or semi-automatic.
Cutting
Making a large sheet of paper into several smaller sheets is termed cutting.
Paper cutting can be of either inline or offline. Inline cutting are commonly
performed in web-offset presses. As the web moves out of the printing unit it
will be cut into sheets of desired length.
Offline cutting is performed in sheet fed presses. Sheets are cut to size so that
it can be fed into presses or the printed sheets can be cut to produce finished
products such as business cards.
Trimmingis the process of cutting uneven edges of the paper. It is performed
in booklets, magazines or other publications.
Cutting and trimmimg are done by equipment such as guillotine cutters (single
knife cutters) and three knife cutters
Guillotine cutter
It is a device equipped with a single blade to trim or cut a pile of paper to
finished size.