Saturday, February 2, 2013

Not all it's cracked up to be...

An interesting result from yesterday's firing; while cutting the circle for the blank, one white strip bisected accidentally. I didn't worry about it, since I was about to fuse it into a solid piece anyway. Even doing so, there are telltale signs:

In this picture you can see little dimples where the crack was, both at the inside edge (where the crack met the red stripe in a 3-way "joint") and at the outside edge, where it looks like clear glass filled the gap instead of white.

Holding the piece itself you can see the crack is lighter in color, although the surface is smooth. It looks like the clear base fills in the gap instead of the white, and while there doesn't appear to be any weakness, it is visible.

The fourth blank had a similar issue, a small but not insignificant chunk popped off a white strip. The "heal" is noticeable, as before:

(Update, a few days later):

Another variation of this turned up when I made the plate, though you can see it in the last photo as well. Fusing is no replacement for good cutting and fitting!

There was a slight error or shelf present and the red stripe was not in as solid contact with one white piece as it was the other. As a result, on close inspection, you can see how the clear again made up the difference.

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