February '21

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G R A P H I C S - P R O. C O M 2 0 2 1 F E B R U A R Y G R A P H I C S P R O 5 3 posed areas of the image harden while the unexposed areas remain soft. The softer ar- eas are washed away, leaving behind an area in the mesh void of emulsion in the shape of the image. This is where the ink will pass through when the image is printed. Before printing, the screen is scrutinized and any unwanted pinholes in the emulsion are blocked out. The edges of the screen are taped so unwanted ink can't seep through onto the substrate. The screen is placed on a substrate. A reservoir of ink is poured onto the screen, and a squeegee is used to push the ink through the holes in the mesh onto the substrate (Figure 2). STENCILS The stencil is a non-permeable material that masks the areas that won't be printed and allows ink to transfer through the open unmasked spaces. Using a traditional meth- od, stencils can be hand cut in the desired shape and attached to the screen or painted directly on the screen with a filler material that becomes impermeable when it dries. ARTISTIC TECHNIQUE For a more artistic technique, the artist can paint directly on the screen with water- based drawing fluid. After the solution dries, the entire screen is coated with screen filler. When the filler has dried, the screen is sprayed with water, washing out the areas that were drawn with the drawing fluid and leaving the surrounding areas masked with the dried screen filler. PHOTO EMULSION An easy method for creating stencils that Figure 2. A diagram of a screen. The screen is placed on a substrate, and a reservoir of ink is poured onto the screen. A squeegee is used to push the ink through the ar- eas void of emulsion onto the substrate. Figure 3. A film positive output from a computer onto a piece of transparent print- able film. Figure 4. All you need is a computer, graphics software like Photoshop, an inkjet or laser printer, and some printable transparent film, which you can purchase anywhere. Figure 5. Each color should be on a separate layer and labeled with the color's name and should have registration marks so that the screens can be perfectly aligned when printing.

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