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Silk
screen printing from its first days until today has
not changed much in the technological sense; principle of work is the same.
Innovations have been introduced by some other industries like chemical
industry and introduction of computers and their improvement so that quality of
print has been better and time of preparation became minimal. Silk screen is
used for decoration of fabrics, metals, various objects of uneven shape,
pencils, and lighters, printing on various stickers and foils and already
finished products... Principle of work is the following: cliché for printing is
aluminum or wooden frame that can be produced in various dimensions (A4, A3,
B2...). Fabric made of polyester is stretched on the frame. Sifter is spread by
emulsion which, when dried, blocks the pores on the sifter. Printing motive is
made on film or tracing paper and attached on the sifter, after that exposed to
the light or UV rays. The sifter itself is washed from the emulsion to leave
open the holes on the places where the light could not reach. The sifter is
placed on the machine and printing process can begin. To get the print, object
on which the printing is done is placed under the frame with certain
positioning, frame is lowered and by going with doctor blade over the sifter
color goes through the holes leaving the print. In this technique PVC colors
are used so it is advised that the room in which the work takes place is well
ventilated.
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