Using 2" x 2" wood, nails and wood glue, build a frame to desired size. To print a letter size image of 8.5" x 11", a screen of at least 16" x 20" should be built. Stretch a piece of synthetic screen mesh over it and staple into place, tacking the corners first. Put strips of staple tape along each side as you staple, to prevent the staples from ripping the synthetic screen mesh. Work your way around the frame, pulling the screen mesh taught and adding staples. Bounce a coin on the frame when finished to test tautness. Wash screen and frame with soapy warm water and rinse.
Cut a piece of plywood big enough to leave a six-inch border around your screen frame. Cut a piece of pressed board, also known as Masonite, to fit over the piece of plywood. Attach the two pieces with small nails and wood glue to create your print board. Do not nail in the center image area of the Masonite board. Sand all edges.
Measure five inches down from one side and draw a line. Mark the center point of the line. Measure out four to five inches to either side and mark with pencil. Screw the screen print clamps to the print board.
Put an image on the screen mesh that is fastened to the screen frame using photo emulsion. Coat the screen with photo emulsion and let dry. Transfer your image to a film positive by printing it from your computer onto clear vellum paper. A film positive is a piece of clear paper or vellum with an image printed on it. Place the film positive upside down on the back of the screen. Tape into centered position. Cover with heavy glass. Expose for several minutes with a strong light. Develop the photo screen with warm water.
Place your silk screen frame with the image on it into the screen print clamps and tighten the clamps. Place the item to be printed into position on the print board. Put ink in the screen frame and print with a squeegee. Lift the screen to check the result. Print multiples if desired. Clean the screen with the proper solvent for the ink when finished.