Jim Tabor on wed 13 feb 02
> Dear Ivor, Mariko, and others interested,
Mariko, I was going to send this to Ivor but don't have an address so
please forward for me if you can.
I find more bubbles in glazes than not, probably because I fire and cool
quickly. David Green, Pottery Glazes, 1973 English edition has some
interesting photos with an .003" dia platinum wire embedded in the tests
to scale the bubbles and illustrate soaking effects on bubble structure.
This is maybe the best book I've come across on glaze development. I
have a little microscope (measures with marks at .002 mm that enables me
to measure bubbles and their distance among other things) used this
morning in class to help a student compare the bubbles in her test to
the examples in Green's book. She found it interesting.
Ceramic Masterpieces - Art, Structure, and Technology by W. David
Kingery and Pamela B. Vandiver, published by The Free Press is
outstanding for history, science, and technology using 10 important
ceramic works dissected from xeradiography, electron scanning
microscopes and other detailed enlargements along with the science in
materials and firing to show how the micro determines the macro view we
experience. More examples of bubbles. I believe The American Ceramic
Society carries the book and 3 others with great detail on more ancient
ceramic ware. Examples of "Masterpieces" include Egyptian faience, Song
celadon, Islamic lusterware, Iznik tile, Medici porcelain, K'ang Hsi
porcelain, Bottger porcelain, Boucher sculpture, and Wedgewood
jasperware. How clay and glaze works doesn't get more clear than you
find in these well illustrated examples.
Jim Tabor
http://home.earthlink.net/~taborj/index.html
mariko cruse on thu 14 feb 02
Dear Jim.
I did send a copy to Ivor at iandol@tell.net.au. Hope he gets it.
You mentioned about your microscopic observations on "Bubbles". What is
your scope objectives' magnifications?
When I was looking at crazed areasof pots under my 'scope, which is 30X, the
crazing lines were bulged up, as if the glaze was once crazed, but later it
tried to smooth out and couldn't for some reason. Of all the crazing lines
I looked at, there was no exception. Can you explain this phenomenon?
Mariko Cruse
Mariko Cruse
----- Original Message -----
From: "Jim Tabor"
To:
Sent: Wednesday, February 13, 2002 5:39 PM
Subject: bubbles in glaze and books
> > Dear Ivor, Mariko, and others interested,
>
> Mariko, I was going to send this to Ivor but don't have an address so
> please forward for me if you can.
>
> I find more bubbles in glazes than not, probably because I fire and cool
> quickly. David Green, Pottery Glazes, 1973 English edition has some
> interesting photos with an .003" dia platinum wire embedded in the tests
> to scale the bubbles and illustrate soaking effects on bubble structure.
> This is maybe the best book I've come across on glaze development. I
> have a little microscope (measures with marks at .002 mm that enables me
> to measure bubbles and their distance among other things) used this
> morning in class to help a student compare the bubbles in her test to
> the examples in Green's book. She found it interesting.
>
> Ceramic Masterpieces - Art, Structure, and Technology by W. David
> Kingery and Pamela B. Vandiver, published by The Free Press is
> outstanding for history, science, and technology using 10 important
> ceramic works dissected from xeradiography, electron scanning
> microscopes and other detailed enlargements along with the science in
> materials and firing to show how the micro determines the macro view we
> experience. More examples of bubbles. I believe The American Ceramic
> Society carries the book and 3 others with great detail on more ancient
> ceramic ware. Examples of "Masterpieces" include Egyptian faience, Song
> celadon, Islamic lusterware, Iznik tile, Medici porcelain, K'ang Hsi
> porcelain, Bottger porcelain, Boucher sculpture, and Wedgewood
> jasperware. How clay and glaze works doesn't get more clear than you
> find in these well illustrated examples.
>
> Jim Tabor
>
> http://home.earthlink.net/~taborj/index.html
>
>
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