How to Use Speedball Screen Print Materials


(♪♪♪) Today we’re going to
take you through the steps of basic screen printing. We’re going to be using
products that you can find in the Speedball Ultimate
Screen Printing Kit, and various other products
you’ll find on the website. There are several different
techniques that you can use to do screen printing, including a stencil technique
which is the most basic, a Screen Filler technique, and then the most popular which is the Diazo
Photo Emulsion technique. We’ll take you through
those steps now. With the Diazo
Photo Emulsion method you’re going to want to start
with a clear film positive. The clear film positive
can be created by drawing on to a clear film, or you can use artwork
from your computer and print it out onto
a laser printer or a photocopier. When you’re
printing on clear film with a laser printer
or photocopier, you might want to
print a double layer. That’ll help with
the opacity of the image. Wherever we have
an image here we’re going to be
blocking out the light. That’s what we’re going to
use to expose the screen. The Diazo
Photo Emulsion Fluid is a two step process. There’s a small bottle
called the sensitizer. It actually is a dry material
so you’re going to be adding water to it. You want to fill this cup
halfway with cold water and then mix this cup
thoroughly by shaking. Just close the lid
and shake it up. Once you’ve mixed
the sensitizer thoroughly you’ll want to add it
to your Photo Emulsion. This sensitizes
the Photo Emulsion, it makes it
sensitive to light, so you’ll want to be careful
to work in a dimly lit area. You don’t want to
do this outside. Now you mix this together
thoroughly so that you get a nice thorough
mix of material. Now our Photo Emulsion
is sensitized and is going to be
sensitive to light. Once you have it mixed
you take a clear screen. Wash the screen with
a little detergent and soap and water just so that it’s nice
and clean and dry before you start. On the back of the screen
you apply an even coat of Photo Emulsion Fluid
across the screen. Use the squeegee to draw that
down all the way across so that you get a nice
clear complete covering. We’re going to add a little more, and fill that screen with
photo emulsion. Once your screen is filled, you’ll want to set it in
a dark place to dry. You want to
make sure now that your screen
isn’t exposed to light. Once you’ve allowed
your photo emulsion to dry on the screen, remember to work
in a dark area because this is
sensitive to light. Take the clear film positive
that we prepared earlier, and place it over
the top of the screen. If you have a piece of glass
to put on top of that, that will help improve
the contact between the image
and the screen itself. You’ll want to use either a 150 watt
clear incandescent bulb, or a 250 watt
photo flood blub. If you don’t happen to have
a photo lamp in the house, go ahead and use
a pie tin over a bulb. We have a reference guide for
the exposure times necessary depending on
the size of the screen and the distance and type of bulb
that you’re using. Refer to this guide to
determine just how long of an exposure time
you’ll want to use. Here we have a screen
that’s about 12 inches away, and we’re using a
150 watt incandescent bulb, so we’re going to expose
this for about 45 minutes. After the end of
your exposure time for your particular screen, you’re going to want to
take the screen to a kitchen sink. What we’re going to do is
wash away the Diazo Emulsion coating that was protected
from light. All of the coating that was
exposed to light is going to remain hard and actually
resistant to water. The unexposed area is going
to wash away under the sink. You can see what
we’ll want to do is work both the front
and the back of the screen until we can
clearly see the image available on
the screen itself. Once you’ve washed out
your screen and allowed it to dry, you’re going to want to use
some masking tape to mask off the inside edges
of the screen. This keeps the ink from
running in underneath the edge of the screen
and the frame itself. Apply a nice border
of masking tape, and now we need to
select the type of ink we’re going to use. There are various different
types including water-soluble, acrylic ink and fabric ink. Today we’ll print on a t-shirt
so we’re going to use the Speedball Fabric Ink. You also want to select
the correct squeegee for your project. There are two basic
types of squeegees: a fabric squeegee, and what we call
a graphic squeegee. The fabric squeegee
has a rounded edge, and the graphic squeegee
has a square edge for sharper printing. The rounded edge
in fabric printing allows us to draw
over the fabric without creating buckles. You’ll want to take a t-shirt and stretch it over
a piece of cardboard. The cardboard helps to keep
the ink running through to the other side, and keeps your t-shirt
nice and tight. Lay the t-shirt down
in front of you, make sure you’ve got
a nice smooth area. Place the screen on top
and locate the image that you want the print. Then we’ll take
some fabric ink and put a layer of it
across the screen itself. Then taking our
fabric squeegee, we’ll want to start with
what’s called a flood fill. That’s going to fill
the area with ink. We want to make sure we get
plenty of colour into the spaces
where we’re printing. After the flood fill,
we’ll set it back down, and draw the ink
down across the image, going over it
a couple times to make sure
we press the ink through. Hold the squeegee
at a 45 degree angle, and pull it down
in a nice consistent way, and then lift your screen
off the t-shirt. Allow this to dry
for about an hour. With Speedball Screen Printing
products you can do a wide variety of
screen printing techniques- t-shirts, art, fabric,
images on paper. All the supplies you need
are available on the website, and refer to our screen printing
reference guide for additional details on
screen printing techniques. (♪♪♪) Captioned by GigEcast
www.gigecast.com

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