You are probably wondering what mummies have to do with abrasive blasting, but then you may have worked on glassware before. Do you get an inkling where this is going? Well, in our workshops, I watch people often applying photo resist to a drinking glass and then proceeding to tape up the whole glass, creating a “mummy”. If you are guilty of this, you should keep in mind how much tape and time you could be saving by simply only taping one strip of 1.5” tape around your image area and making sure to leave the strip going across the top and rim of the glass standing up; by that I mean do not fold the tape over the glass rim but leave it sticking straight up. Now the tape acts as a deflector for the abrasive while blasting and keeps you from accidentally blasting the inside of your glass. With a foot pedal to control the on/off flow of the abrasive, you can control where and when you are blasting. So point the nozzle directly at the stencil before stepping on the foot pedal, blast and then take your foot off the pedal before moving the glass in the cabinet.
How to avoid making a "mummy" when applying a photo resist
November 16, 2010