Before all this though, the arwork
has to be done.
This is the process of getting your logo, company
name, phone numbers and other information you want to
tell people about, and shuffling them about to fit in
the space that can be printed on the product.
There is a maximum amount of space on any product
that can be printed due to its shape, or limitations
of the printing process (it may not be possible to
'get at' all the space that seems to be available).
At
we usually start by fitting your details into the
maximum print area. If you want the message more discreet,
this can be done however - you always get a proof
before printing is started, and alterations cost you
nothing - we would sooner you are happy with the finished
result.
We would prefer that you send us your artwork in
“jpg” or “gif” file format.
Once we receive your artwork, it is a matter of typing
the information you want, putting it in the correct
typeface to match that on your stationery, and adjusting
everything until it all fits in the space available.
You then receive a proof in black and white, usually
on the fax, together with the acknowledgement of your
order. Any alterations you want are then incorporated
until you are happy with the final result. We then
print out a very sharp copy of this artwork to send
to the printer.
If your logo or message is made up of more than one
color, the colors are 'separated' and we print off
a black and white copy for each color, all marked
with 'register marks' so that they will line up correctly
when printed.
From this 'camera-ready artwork' a film is produced
- so the black image appears on a transparent background.
Also known as silk screen printing, the screen is
a fine mesh contained within a frame. The screen is
covered with a light-sensitive coating. Light is then
shone through the film (see arwork
section above) on to the screen. Where the light
shines, the coating solidifies. Where the black image
prevents light reaching the screen, the coating remains
unchanged and is washed off.
The product to be printed is put on a horizontal surface,
the screen placed on top, ink is placed in the screen
frame and is then forced through the mesh by means of
a squeegee. The only place where the ink is able to
penetrate is where the coating was washed off, so the
image of your artwork is printed on the product. This
process can be taken further along. For example, T-Shirts
and other clothing items are printed on a large machine
with, perhaps, eight 'stations' so more than one shirt
can be printed at the same time. Pens are printed on
a machine where plain pens are fed in at one end. Each
in turn is held by an arm, which places the pen in contact
with the screen. The pen is then rotated so that your
message is printed around the barrel. One drawback to
screen-printing is the difficulty of reproducing tints
of colors. The tint is made up of lots of small dots
of color in a regular pattern. The more dots the stronger
the tint. The screen as we have seen, is a mesh, and
the two patterns can conflict resulting in a patchy
print. For this reason, it is often not possible to
reproduce a tint except by printing a second, solid
but lighter color, at extra cost. Tints can be usually
be reproduced satisfactorily on larger items such as
T-shirts and umbrellas, though.
Also known as tampo printing, with this process, a metal
plate is produced from the artwork with a raised image
the 'right' way round. The plate is fixed into the pad
printer and inked. The product is placed in a jig so
those successive products will be printed in the same
position - vital in two-color work. The 'pad' - a firm
yet resilient synthetic material is then pressed against
the plate taking up the image, and this is then transferred
to the product.
This process is used to print most things that are printed
on paper. The image is transferred photographically
from the film (see artwork above)
on to a flexible flat printing plate with a light-sensitive
coating. The image on the plate is the 'right' way round,
and the chemical coating attracts printing ink, but
not water. The coating on the part of the plate without
the image attracts water but not ink.
The plate is assembled on to a roller in the printing
machine, and is first coated with water via another
roller before coming into contact with the ink roller.
The oil based ink stays only on the image part of
the plate because of the coating, and the ink is smoothly
distributed by means of other, vibrating, rollers.
The image (reversed) is then transferred (or 'offset')
to a rubber 'blanket' which is on another roller,
and this makes contact with the paper coming through
the machine. The reversed image on the blanket is
then printed the right way round on to the paper.
Promotional pads, and calendars are printed in this
way, and one advantage of the process is that tints
can be reproduced. (Tints are difficult to reproduce
clearly by screen print).
In this process, a metal blocking die or plate is produced
from the film (see artwork
above). The block has been etched so that
the image is raised and your message appears the 'wrong'
way round.
It is placed in the blocking machine and is heated.
Your product is below, held in a jig. Between the
two is a 'foil' running from one reel to another.
There are two parts to the foil, a carrier film and
the foil itself. When the hot block is put, under
pressure, against the product with the foil in between,
the part of the block in contact with the product
is the raised part on which your image appears. The
result of this process is that the foil attaches itself
to the product in the form of your image, and the
carrier film is moved on to bring new foil ready for
the next product.
Foils can be of a selection of colors, but gold and
silver are the most often used. The result is a really
shiny gold or silver image. However, because of the
pressure, and the fact that a solid foil is used,
rather than a liquid printing ink, with foil blocking
a lot of small details can be lost - 'filling in'
as it is called. So it cannot be used if tints are
wanted, or fine details need to be shown. However
with the gold blocking of a crest for example, the
overall appearance can be far better with the bright
gold, than screen printing where the gold effect is
duller, but the details are clearer.
|