Preparation
of
Screen
Printing
Plate
A
screen
printing
plate
is
composed
of
a
screen
mesh,
a
frame,
and
photosensitive
emulsion,
among
other
components.
First,
the
screen
mesh
is
tightly
stretched
over
the
frame.
Then,
a
photosensitive
emulsion
is
coated
onto
the
screen
mesh.
Next,
a
film
with
images
or
text
(either
negative
or
positive)
is
placed
over
the
emulsion-coated
screen
mesh
for
exposure.
During
exposure,
the
photosensitive
emulsion
in
the
areas
corresponding
to
the
transparent
parts
of
the
film
undergoes
a
photochemical
reaction
and
hardens,
while
the
emulsion
in
the
areas
corresponding
to
the
image/text
parts
of
the
film
remains
unexposed
and
soluble.
Afterward,
through
development,
the
unhardened
emulsion
is
rinsed
off,
leaving
a
hollowed-out
area
on
the
screen
mesh
that
matches
the
images
or
text
on
the
film.
This
hollowed-out
area
serves
as
the
channel
through
which
ink
will
pass.
Ink
Coating
and
Scraping
An
appropriate
amount
of
ink
is
placed
on
the
screen
printing
plate,
above
the
area
corresponding
to
the
image/text
parts.
At
this
point,
the
scraper
(squeegee)
installed
above
the
screen
starts
working.
Driven
by
a
precision
control
system,
the
scraper
moves
at
a
set
pressure,
angle,
and
speed
in
a
uniform
linear
motion
(or
reciprocating
motion)
along
the
surface
of
the
screen
printing
plate.
Under
the
extrusion
of
the
scraper,
the
ink
passes
through
the
hollowed-out
image/text
areas
on
the
screen
printing
plate,
transfers
to,
and
adheres
to
the
flat
substrate
below,
thereby
replicating
the
same
images
or
text
as
those
on
the
printing
plate.
