I want to thank everyone who responded to my query. We had a family
emergency that has kept me busy and I am just now getting back to
From the replies, it does not seem that I have a contamination issue
in my shop - which was my worst fear. (Well, one of them anyway ;-0
) I have done torch firing and LCE as a counter enamel doesn’t seem
to like direct heat.
I had my kiln temp up because the temp would drop to as low as 1350F
when I inserted the enamel pieces (I have a bead door and work pretty
quickly getting the enamel pieces in and out). In retrospect that was
dumb. I will adjust the temp, shorten the firing time and use a
thicker coat of counter enamel. Or just stone the edges and
Thank you Donna for pointing out that the green edge is a normal
reaction and Kay for suggesting that the coat was too thin.
most of the european enamels contain a lot of borate flux instead
of lead oxide to lower the liquidus point on this will dissolve
any oxide present. The porosity of the enamel in the thinner spots
will accentuate this.
-Very interesting comment, I will look into this further. I
currently use lead-free Thompson enamels.
And Jamie summed it all up:
However, when I kiln-fired, I always kept the kiln at 1450F and
most jewelry-sized pieces only needed 2 minutes (all Thompson
enamels, which includes LCE-3). So, you may want to add a little
more enamel, back off the heat by 50F and shorten your time by 30
seconds (or cross your fingers and pray, which seems to be the only
solution on many enameling problems ;-)
(I hope I didn’t miss any replies.)
Again, thanks to everyone - And, I hope everyone has a very happy,
safe and delicious Thanksgiving.