The spikes you describe are
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November 10, 2008 at 8:43 pm #10963
AnonymousInactive
The spikes you describe are caused by friction of the melted glass against the surface of the shelf. It is much more common when firing on fiber paper.
Fusing at a lower temperature – so that the glass is less liquid – will also help reduce the problem.
Paul
FusedGlass.Org
Helios Kiln Glass Studio
PaulTarlow.com
