My apologies for the hiatus in posting. I had to work in other media for a while – other than wood. Had to go where the paying customers were!
Anyway, I wanted to bring up something that occurred to me when my daughter brought home a school etching project. The kids had created etch masks which were used to sandblast the designs into a piece of 2×4 lumber (pine wood). What I found interesting, when I saw it, was that the ridges created by the growth rings exhibited very little erosion, and the grooves were correspondingly quite deep. In etching terms, this would be referred to as having “high selectivity.” Here is the finished piece from the front:
And here is a side view to demonstrate the ridges and grooves:
After seeing this, it occurred to me that if the starting worpiece was only 1/4″ thick, the grooves could potentially go right through the whole piece (creating openings) while the ridges would still be intact. This could be used to create a cool artistic effect. So, I plan to try this out in the next few days and I will report back the results on this blog. (If anyone else has tried this already, please feel free to post your results here.)
In the mean time – Happy Blasting!!