Awards & Engraving

April '18

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46 • A&E APRIL 2018 people begin to get lost. Most beginning sandcarvers wrongfully assume that a photoresist must be a resist made from a photograph. This is not true. The resist is produced by a photographic process, but the original is almost always black-and-white line art, not a photograph, even though it has become possible to produce resists from photographs with good quality, but that is not the general application for photoresist. The basic exposure unit for photore- sist uses UV light to process the material. Nowadays there are two types of photore- sists on the market: one that requires water for washing it out and another that is a dry process film. It is best to try out both to decide which suits your work best. To set up a dark room area requires about 6 linear feet with a washout station or 4 linear feet for dry processing only. The lighting needed is as simple as using yellow "bug" lights from the grocery store. • Tables for product preparation and clean-up and/or color application. One to two 8-foot tables are a good space, and if you are going to do a lot of color application, a spray booth may be a good investment (about $350). Access to water will facilitate the clean-up process since photoresist floats off any substrate once submerged for a short time. Your preparation area needs to be a clean space away from blasting activities. Your table needs to be covered with carpet if you are applying stencils to glass objects. This helps you prevent scratches on glass as the glass is cushioned by the carpet and any small debris items will fall into the nap of it. A couple of tape dispensers help in the preparation of items to be blasted as well as a roll of cling wrap. The most common items used are paper towels or wipes and a glass cleaner without ammo- nium. Large trash cans help keep your work area clean. I mentioned two tables: use one as a Basic UV exposure unit for processing photoresist of any kind. Artwork transparency is superimposed on a sheet of photoresist film prior to exposure. The transparency and film are inserted onto the clear cylinder of the exposure unit and covered with a flexible black blanket. The UV light is turned on to expose the material.

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