unfinished edges

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#11820
Stephen Richard
Participant

There are a number of reasons for the spikes on the edges of kiln formed glass.  Without a picture it is difficult to help because so many assumptions have to be made.

If the edges are spiked the classic reasons for that are: a make up of less than 6mm, firing too hot, firing on fibre paper or batt wash rather than thinfire, glass touching something during the firing.

If the edges are rough -as opposed to spiked – the classic reasons are: ground edges without proper cleaning, thinfire curling in and leaving a deposit.

There are, of course, other reasons, but these seem to be the most common.

I have assumed you are using fusing compatible glass. If not, then there are a whole range of other factors that can give difficulty.

Othere have more experience than I do with microwave kilns, but I think you probably are too hot in your firing.

Stephen Richard

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

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