Awards & Engraving

November '17

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Page 45 of 68

A&E NOVEMBER 2017 • 43 photomask application and correct posi- tioning of the nozzle during blasting. Since these surfaces are unpolished, a self-stick photoresist film will not adhere well. Sur- faces that are uneven or porous require an extra adhesive. In some cases, heating the surface will cause the photoresist stencil to sink into the grooves of the surface. We recommend heating the surface with a mini propane torch or heat gun and then applying the stencil to the hot surface. Remove the clear liner and press the stencil with your finger into the irregular surface. Blast at a 90-degree angle if the surface has grooves and bumps. Use the air and sand to push the mask to the surface. If you blast at an angle, then the air and sand will want to lift up the design. Allow the sand flow to work for you. 5mil photoresist film is perfect for a surface etch. With a 5mil, you will not blast deep into stone. The 5mil is ideal for pavers/bricks that are on a walkway, where minimal depth is required. A 6mil photoresist film will provide the ability to achieve depth into stone surfaces. Detail to the artwork is important when dealing with irregular or porous surfaces. A small font or a script font will get lost in a porous surface. In some cases, increasing the size of the font or adding a stroke to thicken the font will cause the font to be viewable once sandcarved. This is true with We recommend using 5mil when sandcarving ceramics because the blasting pressure can be raised to 40 to 50 psi with 150 grit aluminum oxide or silicon carbide. ALL IMAGES COURTESY LIZ HAAS Sandcarving Systems SR3000 TM Self Stick Photoresist Film 800-729-9478 3 Easy Steps Automatic Washout Systems

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