Silkscreen Lessons 3 5 6

8/8/2019 Silkscreen Lessons 3 5 6

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Preparing & Exposing

Photographic Silkscreens

For use with Lesson 3

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In a darkened room or in a room witha yellow safe light, pour the emulsioninto a scoop coater


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Coat the screen, applying 2 thin coats ofemulsion on each side of the screen.


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If your scoop coater is

smaller than the width ofyour screen, coat asshown in this slide.

Once you have one coat

on this side, turn thescreen upside down to

apply the second coat.Then apply two thin

coats onto the back sideof the screen, againflipping the screenupside down in between

coats.

Wipe off any excess

emulsion that gathersaround the edges.


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Store the coated screens

in a dark room or light-tight box until they are dry.Screens should dry with

the flat side down (theside you used the

squeegee on should be

facing up). They need todry perfectly flat. If thescreen is tilted even theslightest bit, then theemulsion might dry

unevenly and run off the

screen.


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If you are coating

more than onescreen, stack them

using small blocks in

between each one.


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Once the screens

are dry they may beput in black plastic

garbage bags until

you are ready toexpose them


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Expose the silkscreen with the students FilmPositives. There are different types of exposing

units. This one is a light table with clear glassand florescent light bulbs.


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This process involves direct contact exposure. There must beno space between the Film Positive and the screen. Build a flat

that is larger than your image, but small enough to fit inside thescreen to ensure direct contact. Cover the flat in padding andblack fabric to protect the screen.


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Weigh down the flat with something heavy.


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A screen exposurechart should be

included with youremulsion. If not, you

will need to testexposure times. A

good time to start withis 5 minutes.


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After your exposuretime is up, rinse the

screen on both sides.The emulsion that wasnot exposed to light(because it was

blocked by the opaqueblack areas of the Film

Positive) will washaway. Wash the

screen until there arevery few white bubbles

remaining. Store thescreen on a flat

surface to dry or use afan.

When dry, screen is

ready to proof.


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Cutting Stencilsfor use with lesson 5





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The first color stencil isLayer 1 the background

color. This should bethe lightest color of your

color combination.

Draw the background

rectangle or square inthe center of your

paper.


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Cut this shape by

using a cutting tool.


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Using the students

collage as a guide, tracethe shape(s) for Layer 2

in the center of another

piece of paper.


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Cut these shapes, as

well.


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Repeat the processfor Layer 3.


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Stencil and Photographic

Silkscreen Printing

For use with Lesson 6





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Tape your silkscreen using two-

inch masking tape.

Tape both sides of screen.


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Place your Layer 1

stencil on top of a piece

of your final printing

paper. Make sure the

open area of the stencil

is in the center of thefinal printing paper.

Keep the stencil

From moving by taping

it to the printing paper

using two small pieces ofblue painters tape.


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Place your silkscreen in

the hinge clamps,

securely tightening the

clamps.


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Register the stackedstencil and print paper to

the silkscreen. Use tape

brackets on the print

surface/table to mark the

corners of 3 sides of the

printing paper. Thesemarks will be guides so

that each piece of paper

is placed in the same

place on the table,

ensuring that the printed

shape is in the sameplace on each piece of

paper.


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Carefully remove the

small pieces of blue

painters tape holding

the stencil in place on

the final paper.

* Be careful to not

move the stencil from

its position.*


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Carefully close the

screen over the stencil

paper.


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Print the first color

using enough ink for

adequate coverage.


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The stencil will stick to

the back of the

silkscreen because the

ink acts as an adhesive.

For large areas of color

(like the background

Layer 1) you may need

to flood the silkscreen or

make two passes with

the squeegee.


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Continue this process,

placing each piece of

paper inside the tape

marks until all 10 pieces

of paper are printed.

Remove the stencil from

the silkscreen anddiscard.

Clean the silkscreen and

squeegee thoroughly.

The two-inch tape you

placed around the edges

of the silkscreen in Step# 1 should remain until

you are finished printing.


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When Layer 1 of your

print is dry, place the

photographic Film

Positive for Layer 4 onto

your print and register it

to the first printed layer.Tape this to your print

using two small pieces of

blue tape to ensure the

Positive does not move.


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Register your next

stencil (Layer 2) to the

Film Positive. Once it

is in the correct place,

use two small pieces

of painters tape to

secure it to the print.


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Remove the Film Positive.


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Place the stacked

stencil and print paper

under the silkscreenand use tape to mark

the edges of your

print, as in Step #4.


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Repeat the previous steps for printing and

cleaning the screen.


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Register your next stencil (Layer 3) to the

Film Positive. Once it is in the correct

place, use two small pieces of painters

tape to secure it to the print.

Remove the Film Positive


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Repeat the previous steps for

printing and cleaning the screen.


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To print Layer 4,

register your Film

Positive to your print

using small pieces of

painters tape tosecure it to the print.


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Clamp your second

silkscreen with the

photographic image

burned onto it in the

clamps and securely

tighten.


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Remove the Film Positive.


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Print your final layer and

clean your screen.

Documents

Silkscreen Lessons 3 5 6