How to avoid making a "mummy" when applying a photo resist

With over 35 years in the glass business, Ruth Dobbins offers experience in fused and cast glass, as well as in glass-etching techniques. Ruth holds a Master's Degree in Printmaking and Art History and has been a partner in a stained and fused glass wholesale supply company in Europe, which also placed great emphasis on a training program. For the past 20 years, she collaborated with her husband Norm Dobbins in commission work, writing books and creating videotapes on how-to techniques for glass etching. Ruth taught these techniques for 30 years in the U.S. and other countries. Ruth continues these venues by offering a complete training program at Aliento School in Santa Fe, New Mexico, and by teaching at various trade shows, including The Awards & Engraving Show. One-on-one training and consulting services are also offered. You can reach Ruth by email at, by phone at 505-473-9203 and by fax at 505-473-9218. Check out the website at

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.