June '23

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G R A P H I C S - P R O. C O M J U N E 2 0 2 3 • G R A P H I C S P R O 6 7 guess what, the material you probably ended up buying initially may not be the best choice for some of the products you want to make. e decision of the masking material to be used really should be made on the basis of the question: "What are you going to be blasting/engraving on, and what is your method of blasting/engraving?" Let's take a look at some of the possibilities. Masks for blasting First of all, you want to determine what you are going to be blasting on and sec- ond, which technique is going to be used. e simplest of these choices is working on glass and most likely glass wear and/or award blanks or metal. For this scenario the mask of choice would be any type of photoresist. Most of you are familiar with the brands available and have probably have a product of your choice. It would be useful to inves- tigate the different materials on the mar- ket. Why? Because you may not use the best choice for what you are going to do. If a single blast stage is all you do, then you can ignore my next ruminations. Should you want to blast deeply and/or in a couple of stages, then you should be A diagram showing the before-mentioned resists and a list of customary applications. (Courtesy of Professor Glass). Various photoresist already exposed (imaged). The green resist is a non-washout resist and requires negative artwork instead of positive, as all others do. (Courtesy of Professor Glass)

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