General Category > Tools

Compatibility Testing: Ring test

(1/1)

Administrator:
I really like the ring test. You apply a stress to the glass and see if it can take it. I make a cylinder large enough to allow a few rings to be cut out of it. It can be a thick ring test or a thin ring based (I think) on the types of final glass you will be making. I make the thicker type with walls around 1/4"-1/2" thick. I've got a large 14" tile saw and just make rings starting from the center of the cylinder. Making a single ring from the top is kind of cheating and doesn't mean an "internal" ring will survive.

When a ring makes it you can slice it to see if it has much stress built up. If it closes a bit, the outer layer has a higher LEC than the inner layer. You need to make both an encased and outside version of your test glasses to be sure they are fully compatible. I have an opal phos which works when it is on the outside, but cracked immediately on the saw when encased.  >:(

Navigation

[0] Message Index

Go to full version