Does anyone know if a dental kiln (for doing porcelains) will
work well for doing vitreous enameling.
Hi Dallas, It is not a dental kiln which you are looking for, it is a
porcelain furnace. A dental kiln is a burnout furnace, used to
eliminate wax and plastic from the mold in the casting ring prior to
casting. The porcelain furnace is what is used to fire the ceramics
in building porcelain jacket crowns, and porcelain fused to gold or
’crud’ metal as I call it.
These porcelain furnaces definitely have pyrometers and are accurate
to about +/- 5 deg. F at 1700 deg. F. They are also made to be used
with vacuum. They fire under vacuum and can be set to raise the
temp. at a very consistent rate. The rate ( ramp speed ) is set by
the operator as is the idle temp. and the final temp. that you will
use. You can set the low end anywhere, and the high temp. can be set
anywhere also, but only up to 1800 deg. F. Hotter than this and you
will burn up the muffle ( the heating chamber ). You DEFINITELY
will burn out the muffle at this temp.
The size of the muffle is not very large in height, length, and
width. Now the bad news. Porcelain furnaces are very expensive, even
used. Another thing is that you can’t set the article to be enameled
right onto the bottom of the muffle. You need to put it on a tray
and insert it slowly into the muffle with a 12 inch long tweezers.
Conversely, when removing the article, you slide it out to the mouth
of the muffle and let it cool until the ‘red color’ disappears. You
then wait a few minutes and remove the tray to a cooling ( heat
resistant ) tray on your bench.
If you wish to discuss this further, please feel free to email me
and I will send you my phone number. My address is
@Edward_Meister1 . I was a Dental Technician for over 30 years. I
do suspect that the furnace would be just the ticket for this