Monday, February 21, 2011

Third Step

Ok now that you got your screen with the dry photo emulsion and you have your design/artwork on a transperancy you are ready to burn the screen. That means we need to expose the silk screen emulsion to light.
You will need:
  1. A piece of glass that fits on your screen.
  2. Black cloth.
  3. A lamp with a 150W clear incandescent bulb or a BBA No.1 Photoflood bulb.
-Now place black cloth on top of the table. This will prevent the light to reflect back and ruin the exposure of the design to the silk screen.
-Set your artwork on the screen with a sheet of glass over it. The glass will keep your design in place during the burning.
-Place the screen with the design and the piece of glass on top of the cloth.
-Put the exposure light about 1 foot above the screen.
-Expose the screen for about 10 to 12 min.
-When done take the screen to a sink or tub and spray with water. Preferably mist. Rinse it off until you can see your design through the screen.
-Let it dry for a few minutes.
This steps are crucial. It will be the toughest part of screen printing. Hopefully after a few tries you will get it.

Sunday, February 13, 2011

Second step

Preparing a Positive:
While waiting for step one, create  a design for printing.
Preparing a positive, means that the exposing silk screen needs a design that is black on a transparent paper. There is different ways to do so, but we are gona use the easiest way.
Materials:
  • Black marker.
  • Clear tape.
  • Blank Transparency paper
Tape the blank transparency paper to the table where your working at with clear tape. Choose any design that you want to print on a t-shirt. Once you have picked the design draw the design/drawing in the blank transparency using the black marker. If your artistic abilities are not so great, you can print the design/drawing from the computer. Place it behind the transparency and trace the design/drawing.
Remember for this step the design/artwork has to be all black. All the clear areas of the positive allow ultra violet light to pass trhough it. All the dark areas of the positive block the ultra violet light and leave the photo reactant emulsion on the background unharden.  All of the soft areas left unharden when sprayed with water will rinse out, leaving a hole in the mesh were ink can pass through.

Friday, February 4, 2011

First step

First of, you need a dark place with enough elbow room to work in. A table waist high in a dark room will do. The reason why the room has to be dark is because we are going to apply the photo emulsion to the silk screen, and the photo emulsion is sensitive to light. (Although some emulsions are safe against sun light.) 
The materials you will need to use with the next steps are: 
  • Silk screen. 
  • Photo emulsion.
  • Squeegee.
  • Towels.
  • Red photo dark-room light.
Ok, Ready? here we go:
  1. Place some towels on top of the table so you dont damage it with paint or emulsion.
  2. Wet the silk screen using the squeegee by spreading the emulsion on both sides, make sure you are doing this with no light present, also make sure the whole thing is wet, with no spots missed.  Since you cant use normal light to check if you got the screen fully wet, use a red photo-darkroom light.
  3. Let it dry in a complete dark room over night.