![]() You can measure your lamp with two exposures using a Stouffer 21 Step Scale to measure the stencil hardness, then refine your exposure with an exposure calculator. These estimated time charts are based on known commercial screen printing UV light sources on 305 mesh. Start by checking the suggested exposure time on the product Technical Data Sheet. When the stencil doesn't hold in the mesh, it didn't get enough exposure. ![]() Best Sellers Rank: 123,569 in Home ( See Top 100 in Home) 8,801. Place of Business : GRAND RAPIDS, MI, 49507 US. Expose the screen for the amount of time you came up with in Step 3 again. Move the thick, opaque paper down to where it is covering all but the first 2 rows. Expose the screen for the amount of time you came up with in Step 3. Manufacturer : Speedball Art Products Company. 180 / 10 18 seconds) Tape the calculator to screen, and cover all but the first row with thick, opaque paper. Screen makers can only expose one side of the stencil, so it is important for the UV energy to move through the stencil, all the way to the back, where the squeegee blade will rub the stencil where it is weakest. Product Dimensions : 6.35 x 12.7 x 16.26 cm 600 Grams. You block UV energy with a positive during exposure so the image area dissolves when you develop the stencil with water. 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. Dual Edge Aluminum Emulsion Scoop Coater for Silk Screen Printing Coating Tool (10 Inch) 1695. ![]() ![]() Speedball Diazo Sensitizer, 2-Ounce (8.85G) for Photo Emulsion Screen Printing. I am using a UV light and nothing happens. This item: Speedball Diazo Photo Emulsion, 26.4-Ounce. Invisible UV energy reacts with emulsion sensitizer and hardens the stencil so it won't dissolve with water and rinse down the drain. Photo emulsion is best for creating detailed or photographic type stencils for screen printing. I am using Speedball photo emulsion and I cannot burn my image to screen. It is the primary job of the screen maker to learn how to judge exposure. ![]()
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