Dave Finkelnburg on sun 15 may 05
Lori,
Weighing really is better if you want to have control and precision.
Density varies, so volume measurements are not exact. They will work, of
course. It's just a question of how precise you want to be.
Much of my gas car kiln is constructed with 9x18x2.5-inch insulating
fire brick. They work fine. If you stack yours on edge, you will likely
want something behind them to provide additional insulation. You will
probably not be happy with only 2-inches of insulation. The backing,
though, since it isn't exposed to the full temperature in the kiln, can be a
lower duty insulation (less costly, better insulator). Also, brick like
that can't be stacked very high on edge without something to hold them in
place.
By the way, since many people scan the posts by subject line, if you
don't get responses you may want to use a subject line that tells people
what your question is.
Good potting!
Dave Finkelnburg
----- Original Message -----
From: "Lori Doty"
Sent: Sunday, May 15, 2005 11:22 AM
Subject: out of lurking...
> For the past 5 months I have rarely posted mainly because I have been
> learning. I do now have some questions that I have searched the
> archives and cannot get the answers to.
>
> 1) Is it absolutely necessary to weigh glaze components or can it be
> done by measuring spoons and/or measuring cups? I had heard from one
> potter who has done "spoon glazes" but no particulars.
>
> 2) Is it necessary to use small 9x4 inch bricks to make a kiln or can
> something larger be used? I got some soft IFB that are (I'm not kidding
> here) 24x9x9x2 in size. On edge these could make the start of a good
> sized box for a kiln - I hope.
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