Thermography
At the conclusion of an offset print run, a fine resin dust
can be applied to a printed piece. It sticks to the wet print
area and excess dust is removed from non-image areas by
vacuum. The sheet is passed through a heater where the
dust pools and swells on the inked area. When cooled, the
resin sets as a solid plastic raised image. This is known as
thermography and is used regularly on business cards.
The technique should always be used on solid ink but
does not always work on large flat areas.
Thermography should be avoided on items that might
pass through the heating units in laser printers or photo-
copiers, as the resin will melt.
Die-cutting, scoring and perforation
A forme is created which includes a plan for scores and
cuts, using dulled metal for the scores and knives or sharp
blades for the cuts. This forme is called the die and it is
then stamped out of a sheet, using a variation of the
letterpress process.
If you want a perforation in a shape other than a straight
line, it is prepared in the same way but with knife blades
that have notches in them. Where the notch is, the paper is
not pierced.
With die-cutting, notches are used at regular intervals so
that cut pieces will not fall into the machinery of the
printing press, which explains why die-cuts need to be
pushed out of the paper that surrounds them.
Laser cutting
Die-cutting is limited by the flexibility of the blades used to
cut the shapes and the cost of creating the die forme. If you
require greater detail, you might consider laser cutting. It is
capable of intricate detail and burns the paper away
according to the digital file created for the cut. In this way,
you can cut intricate outlines on sticker bases, where the
laser only cuts the top layer, leaving the base intact.
Finishing processes 287
DOING IT CHEAPER
Die-cut folders and brochures
Use existing dies for folders and
brochures—most printers save the
formes of previous jobs ‘out the
back’. Ask to see your printer’s
collection of dies and see if any of
them can be used. This will save you
the cost of preparing the die.
A diecut used on a brochure cover.
Client: Rosanna Golf Links
Studio: Adstract Art
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