burst pin point bubbles.

[Stephen Richard]

These pits are bubbles that have risen to the surface and burst.  Most glass has small seeds (or bubbles ) in it.  These – when the top temperature is high enough or the soak long enough – rise to the surface and burst leaving a tiny “hole”.

The remedy is to fire slower and lower.

Stephen Richard

blogs at: http://www.verrier-glass.blogspot.com/ and  http://www.glasstips.blogspot.com/