STENCIL REMOVAL Remove ink from the screen using the solvent or solvent blend recommended by the ink manufacturer. Touchup Option 2: For non-water-based inks, use Screen System 5511 blockout thinned with equal parts water and isopropyl alcohol and apply with a spotting brush. Touchup Option 1: Use excess emulsion and re-expose the screen. 5511 with a plastic applicator squeegee of 14 ply cardboard. Blot excess water from the printing side with unprinted newspaper stock.īLOCKOUT & TOUCHUP Blockout For non-water-based inks, after exposure and washout, dry the screen. Rinse both sides with a gentle spray until no soft emulsion is left on the squeegee side, and no foam or bubbles remain. Then spray the printing side forcefully until the image areas clear.
WASHOUT Wet both sides of the screen with a gentle spray of cold water. Optimum exposure is indicated: _ At that exposure time when the emulsion first reaches its maximum color density, and the edges of the positive do not "resolve." _ The squeegee side emulsion is hard, not soft or slimy. Use a dehumidifier in the drying area, if possible.ĭETERMINE THE OPTIMAL EXPOSURE TIME Make a Step Wedge Test to determine your optimum exposure time. Under humid conditions, dry the coated screen with warm, filtered air up to 104° F. Additional coats can be applied to the print side to optimize definition.ĭRY THE SCREEN Dry multicoated screens (Methods 2 or 3) thoroughly in a horizontal position, printing side down, at room temperature in a dirt- and dust-free area.
After each coating, rotate the screen 180°. Method 2: Apply two coats on the printing side, then two coats on the squeegee side, wet-on-wet. Method 1: Apply one coat of emulsion to the printing side, then one coat on the squeegee side. The coater should be at least two inches shorter that the narrow width of your screen. Photopolymer emulsions should be handled only under yellow safe light conditions.ĬOAT THE SCREEN Use the rounded edge of a scoop coater to apply an even coat of emulsion in one pass. SENSITIZE THE EMULSION Photopolymer emulsion is fully presensitized. It increases the surface area of fabric for a better mechanical bond of the stencil, increasing printing run length. (Mechanical roughening is an option for new fabric that is not surface treated. Ulano Orange reduces stencil-making time-in coating (because of its high viscosity), drying (due to its high solids), and exposure (due to its high photo-sensitivity despite its “masking color.PREPARE THE FABRIC Used or surface treated fabric need only be degreased using Screen Systems Degreaser 5505. Ulano Orange stencils are durable, will not become tacky under high humidity conditions, and have excellent wet strength and exposure latitude. Ulano Orange resists plastisols, most washup solvents, and some water-based textile inks, and it is easy to reclaim. Its high solids content (44 - 46%) results in better mesh bridging and edge definition, and fast drying. Ulano Orange has high viscosity (6,000 – 8,000 centipoise) that improves control when coating screens by hand and makes it a good choice for coarse mesh. Despite its anti-halation color, Ulano Orange is ultra-fast-exposing! It is perfect for shops with high stencil making throughput, as well as shops with fluorescent tubes or other low-intensity light sources. With Ulano Orange, it is possible to use less costly white mesh without the closing up of fine lines and details. It is formulated with a “masking color” that reduces light scattering-the major cause of loss of resolution. Ulano Orange is a ready-to-use SBQ-photopolymer direct emulsion formulated for imprinted sportswear printing.
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