High-end finishing The third dimension is used as a visible or tangible design element.
rediscovered. The keyword is finishing, and more and more print buyers want to
printed materials stand out from the crowd - and more and more
Print and equipment service providers equip themselves with the appropriate
equipment in order to meet this growing demand and
differentiate itself from competitors through this added value at the same time.
can. It is noticeable that particularly sophisticated-looking effects are booming,
to stand out among the refined printed matter -
above all the 3D effects. They have been proven to increase the
Attention and desire to buy significantly stronger than all others
Finishing effects. The arc of these visible or tactile
results ranges from relief embossing, over embossing and
special paint finishes through to pop-ups.
Feel relief embossing
Tactile reliefs, which are also visible through shadow formation, convey
a classy image on stationery and annual reports. In combination
with high-quality papers, which may also have a watermark
are provided with a touch of luxury, respectability and nobility. Often
these reliefs, which were created with the help of a raised patrix and a
are produced with a recessed die, as blind embossing, i.e.
the paper is only formed in high or low relief. Depending on
depending on whether the blind embossing is single-stage or multi-stage,
less or more depth details can be displayed. Embossing
can also be printed inline using the offset printing process. In this case, a metal matrix
on the blanket cylinder and a felt on the impression cylinder
applied.
The most time-consuming process is the often still manual engraving of steel dies for
steel engraving printing. This process can be used both as a pure
Blind embossing as well as a no less complex gravure printing process
be executed. In the gravure printing process, the engraved
Line and surface elements colored with lacquer-like printing ink, the
is then tangibly and visibly raised on the paper.
Applying foils
The most common three-dimensional film finish is the
Hot foil stamping. This is a high-pressure process under
A layer of paint with gold, silver or colored pigments when exposed to heat
from a carrier film onto the substrate. At the same time
the paper, the folding boxboard, the corrugated cardboard or the book cover
deepened by male and female dies. A very attractive
Option is the combination with subsequent blind embossing
of the foil-embossed sections. For example, the
folding carton finishing die-cutting not only with foil, but also with
linked with blind embossing.
As an alternative to bronzing with pigment powder as well as to
hot foil stamping, the still young cold foil transfer printing
- also known as "Offset Foil Transfer" or OFT for short. As the name suggests,
does not absorb heat or become embossed; nevertheless, its 3D effect is
amazing. The secret lies in the ability to create rasterized subjects
to be displayed. This is possible because the substrate is printed with a
offset printing plate an adhesive layer is transferred to which the
Gold or silver pigments from a subsequently pressed on
carrier film. Large areas can also be
Refinable, which is why no metallized cartons can be printed on
must. With the additional InlineFoiler Prindor
industrialized this process. Heidelberg is on the move
cold foil bandwagon; its new cold foil, first presented at the Ipex
The company refers to this solution as "ColdFoil".
Tear-jerking eye-catchers, glued onto bestseller envelopes,
Computer game and DVD covers make use of purely visual 3D effects,
which are usually either embossed holograms or lenticular foil prints.
are created. Embossed holograms are metallized holograms.
Films that carry a micro-embossed interference pattern. Lenticular films
have microscopically narrow lens strips that are coated on the back with
UV ink are printed in strips in up to twelve phases.
The lenses transform the dissected subject into a three-dimensional image
or reconstructed into a motion effect (morphing, mini-movie, etc.).
Stand out with lacquer contrasts
Also by combining a matt or granulating spot coating,
which gives texture to certain parts of the subject, with a
high-gloss lacquer on the remaining areas can certainly be
achieve a plastic, embossing-like effect. Depending on the existing
machine configuration, the printer can be selected from several
Select gloss contrast process. The highest quality and variety of effects
is possible in hybrid coating on hybrid machines. Here
Hybrid inks with a matt/granulating oil-based printing varnish in the last
Offset printing unit partially printed and then coated with a
UV high-gloss varnish overprinted over the entire surface; the UV varnish only adheres to the
non-spot coated areas. In hybrid and pure UV machines
a UV matt varnish can also be used instead of the oil-based varnish.
However, this matt-gloss UV coating must then also be
UV high-gloss lacquer can be partially applied.
If there are no UV units on the printing press, the
UV high-gloss varnish can be replaced by a special dispersion varnish,
which is applied over the entire surface of the partial oil-based varnish. With
The heated dispersion coating literally drips off the drip-off coating.
from the oil-based varnish, with the Twin Effect varnish, the
normal-temperature dispersion varnish solely due to the non-wettability of the
oil-based varnish. As dispersion varnishes do not achieve the UV gloss,
the gloss contrast is correspondingly lower.
Imitations of security holograms or under the printing ink
concealed lettering and logos are to be printed using
metal pigment-containing MetalFX pre-print varnishes (MFX Base Silver).
The HoloFX separations look great in the bright tones of the security subject
a 25% and in the dark tones a 50% reduction of the MFX
Base Silver compared to the 100% painted environment. Through
user registration, the falsification of holograms is unlikely.
Thermal relief printing works without a coating unit, but only
Suitable for manageable print runs such as exclusive stationery
is. The still fresh layer of paint on the letterhead is removed with a
resin granules, which form a raised surface in a heating tunnel.
coating layer is formed. Additional UV curing ensures that
the finished sheets are later processed in a laser printer
can.
Reserved for screen printing or special painting machines is the
Textured and relief lacquering. Leather and wood textures that are
the granulation behavior (wrinkle skin formation) of the coatings,
are particularly popular. Relief coatings with their high
layer thicknesses and steeply formed flanks, embossing can be
but in contrast to blind embossing, they have an inherent gloss
and cannot display depth details as richly. Outstanding
rotary screen printing is suitable for the production of
Braille dots on labels and pharmaceutical folding boxes.
Pop-ups as display stands
The 3rd dimension results from displays, mailings and inserts
from punched, folded and glued structures. Here
such as car silhouettes, interiors, company buildings and appliance housings
"rebuilt" - there are no limits to the ideas.
Dieter Kleeberg