a few reasons I know of…

#13145
chanticleerjewelry
Participant

I have a fuseworks microwave kiln, and have experienced ugly grey lines in my work before as well. ¬†My microwave is low wattage, so I usually don’t have trouble, but heating too fast/long/more than once, will cause the color to fade out of your dichroic. ¬†Another cause can be grinding edges and not cleaning them enough before heating your glass.

I think there was one other, but right now it’s not coming to me. Maybe someone else can help

Valarie

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