Paul Borian on wed 12 may 10
I have a few bags of 200 mesh silica left over because I stopped using
it in my clay body. I recall from a previous discussion that it means
"200 mesh and finer" and I am wondering if I could use it up by adding
it to my glazes? I am thinking to maybe blend it 50/50 with the 325 mesh
I normally use.
Has anyone used this size silica in a glaze (cone 10/11)? If so did you
have any problems?
Thanks,
paul
John Britt on wed 12 may 10
Hey Paul,
I use that all the time in my glazes- no problems - straight,
John Britt
www.johnbrittpottery.com
David Hendley on wed 12 may 10
All I ever use in glazes is 200 mesh silica. There's no reason to pay
more for 325 mesh.
David Hendley
david@farmpots.com
http://www.farmpots.com
----- Original Message -----
"200 mesh and finer" and I am wondering if I could use it up by adding
it to my glazes? I am thinking to maybe blend it 50/50 with the 325 mesh
I normally use.
Has anyone used this size silica in a glaze (cone 10/11)? If so did you
have any problems?
Paul Borian on thu 13 may 10
Thanks for the replies - so I will just use up the last of the 200 mesh
I have in the glazes.
Does anyone know why some potters prefer 325 mesh for glazes? Someone
told me long ago to use that kind for glazes and I just assumed it was a
common practice. I never even thought about how much money I could have
saved if I only used 200 mesh - but I don't think it was really that
much anyway.
Anyone know the answer?
Thanks again,
paul
Patty on thu 13 may 10
I've been told that switching to the finer silica for 50% of the amount in
the recipe will help solve a crazing problem. If this is true, some recipe=
s
would specify the finer silica. My clay supplier would not ship it to me
until I convinced him that I use a respirator and spray booth for measuring
and mixing glazes.
Patty Kaliher
John Britt on thu 13 may 10
Paul,=3D20
As far as I know, it is because it melts (goes in to solution) better. Fi=
=3D
ner
mesh size melts more quickly. Some books used to say if you want to lower=
=3D
the melting of a glaze add 325 mesh vs 200 mesh. Others say if you have
crazing you switch from 200 mesh silica to 325 to reduce crazing. (thus m=
=3D
ore
silica is in the melted state which is low exp. / cont.)
John Britt
www.johnbrittpottery.com
paul gerhold on fri 14 may 10
Paul,
Back when I was doing Raku I found that the smaller mesh silica definitely
reduces crazing. When I wanted crackle I went for the 200 mesh.
Paul
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