![]() It offers the same exposure time for diazo photo emulsion screens as a traditional 250-watt photoflood bulb but with a dramatically longer bulb life. Use small test pieces first and adjust time if needed. Lightweight, portable, and easy to use, the Speedball UV LED Exposure Lamp is the perfect solution for all your fabric screen printing projects. ![]() For coarse wood or dark paper where heavier ink coverage is desired, a 160 mesh screen can be used. we recommend a 200 mesh screen or higher. (18 inches) 11"x17" stencil, expose for 9 minutes Speedball Permanent Acrylic Ink - Glow White - 8 oz. (16 inches) 8.5"x11" or smaller, Standard or HiDef, expose for 7 minutes Exposure Time: Expose EZScreen Stencil according to the exposure time table below. The foil allows the light to burn the stencil evenly, otherwise the edges may be under-exposed.Ĥ. Be sure that the foil does not block the light from the stencil. The foil should cover the length of the exposure board. Exposing 11”x17” Large Stencil: Wrap aluminum foil around pieces of cardboard and place around 13"x19" exposure board to create a box with 4 sides. Be certain that the light is facing straight down.ģ. Set Lamp Height: Set the height at 16” from exposure board unit for 8.5”x11” stencil or smaller and 18” above for 11”x17” large stencil. Remove both light guards they may create shadows on your stencil if they are not removed.Ģ. Since you re early in the pre-press stages the answers to your problem are obvious and easy to repair, don t worry that you didn t recognize them as even the most seasoned printers overlook minor details. You exposed the screen, attempted to wash out with no results. Read all instructions included in EZScreenPrint kit or refill sheets.ġ. You created the art, output the film and had a screen coated. When you’re all set up, turn on the Speedball UV Light and set a timer for your chosen exposure time.These instructions are for using the Speedball light kit with 250 watt photoflood bulb. Remember to dry your photo emulsion in complete darkness and only bring the coated screen out when you’re ready to expose. If the screen is exposed to too much light before you’re ready, your image may not expose properly. Since this is a fixed/controlled setup, this is a case where you should make several small screens of identical size, and then bracket the times: label each one with the exposure time (1 min 1:30 2:00: 2:30.etc.) expose them according to the labeled time, then pull a test print, labeling each print with corresponding time exposure. ![]() ![]() We chose to do this process in subdued lighting which gives us a little more time to set up. For use with polyester screen fabrics, Speedball’s Diazo Photo Emulsion & Sensitizer may be used with any water-soluble or solvent-based ink and can be easily removed with Speedball’s Photo Emulsion Remover. Place a sheet of glass or perspex on top, to hold the film in place. Once it’s placed, the design should me a mirror image when you look at it from above. The drawn (or inkjet printed) side of the artwork should be down against the mesh. The mesh should be raised above the table. For more help on coating your screen, see this blog post. Place your coated, dried screen on a flat surface, frame side down. Our artwork was Inkjet Screen Film drawn with Zig Opaque Pens and Jacquard Film Markers. We used an A4 43T screen coated with a single layer of Speedball Photo Emulsion and Sensitiser. This was perfect for our setup, but will vary slightly depending on your method and materials used, so you are likely to need to experiment with a few times and distances when you begin. You also need to specify the type of emulsion your using as they all have varying exposure times. Your screen print supply vendor should have them. To expose an A4 screen, we suspended the light 16 inches away from the screen for 8 minutes. Its best to get yourself an exposure calculator.
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