Awards & Engraving

January '18

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A&E JANUARY 2018 • 35 Sandcarving applying the paper layout to the glass for positioning and for proportions. By doing this, it rapidly became evident what needs to be changed in terms of size and/or place- ment, since the glass pieces were more egg- like shapes than even cylinders, which left very little space for our part of the work. As you may remember from reading past articles, I am especially fond of our purple photoresist because of its stickiness and great flexibility once the cover sheet is removed. For us that is really important given our super low humidity levels, which normally causes all sorts of materials to lose their adhesion due to the dryness; the purple film withstands all that. But we also know that in general one product does not meet all criteria required for the work we do, and that is also true for our beloved purple film. As wonderful as we think it is, we also know its limita- tions in terms of keeping very thin lines in tact during the washout with the common Trigger Jet nozzle. Often, those really fine lines are not as crisp as they need to be. I knew that would be true for etching the logo of the glass organization, the Zia symbol. To make sure that the rays in the image would be crisp and clean, I decided to create the bottom half of the stencil with one of our blue photoresists, which is known for preserving fine lines extremely well. Since this would go towards the bottom of the glass piece, I was a little less worried about the material being a bit stiffer than the purple film; it would still conform to the curve nicely with the help of some pleats and cuts. This brought us back to the universal problem of applying a flat stencil to an extremely curved surface, and no, there is still no magic answer or solution to this Mock-up of the text and logo to be etched onto the blank substrate, making sure the size is correct and establishing the placement. Applying the stencils to the blank. Illustrating the usual problems of puckering up and cutting pleats, with lots of areas to be taped off.

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