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Offset
Printing: How it is done?
by: Viojieley Gurrobat
Sometimes, we wonder how the colorful magazines that we read
or the captivating brochures that we receive came to be. Of
course, it all started with a creative process. Writers and
designers work together in order to create a good design. Once
they are done with the planning and designing, printers take
over and take responsibility in creating these designs and transforming
them to a work of art. Printing is a seemingly complex area
that involves an endless combination of skills, equipments and
outcomes. Although letterpress and screen printing are some
of the ways to put ink into paper, offset printing is one of
the processes you will likely find in great quantity in most
print shops.
Offset printing is mostly suitable for printing multicolor
photos and artwork on papers. Most modern printing today is
done through offset. The process involves the transferring of
ink from the impression cylinder to the printed sheet. Offset
printing is based on the principle that ink and water don’t
mix. In the past, lithographers engraved images on a flat stone.
Some stone accepts water while others accept ink. When ink is
applied on these stones, the image stays on the greasy area
and avoids the rest of the stone.
Today, this concept is still being used in printing but with
the addition of one essential element - images are transferred
from the printing plate to a rubber blanket and then to the
paper. When the plate is exposed, an ink receptive coating is
activated at the image area. The plate is then dampened by water
rollers then by ink rollers. The ink sticks on the image area
and the water to the non-image area. From this, the image is
transferred to the blanket and the paper passes between the
blanket and the cylinder and the image is them transferred to
the paper.
There are no limitations on tonal choices with offset printing.
You can even use smaller fonts and much more detailed images.
Offset printing is really good when working in four color process,
if the print job is fairly detailed and uses a lot of color
or tonal ranges. Hence, modern printing has evolved through
offset printing. With it, printing abilities today has increased
significantly in quality and quantity.
About The Author
Viojieley Gurrobat loves readings books in her spare time.
She writes stories and poems about anything under the sun. For
comments and suggestions kindly visit http://www.digitalroom.com/Offset-Printing.html.
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