iandol on tue 31 dec 02
Some thoughts.
i If a glaze is designed to fire to cone "X", that glaze should have =
completed all of the process which lead to the dissolution of it's =
ingredients as the cone tip touches down.
Therefore, there is no need to soak
ii What are the qualities of a glaze which is mature? Where are these =
defined?
iii Not only does the glaze need to complete the reactions which will =
make it form the surface coating we intend. It must also go through a =
series of reactions which bond it to the clay on which it sits. How do =
we define this union? What is happening at this interface.
iv To what extent do the materials which dissolve from a clay into the =
liquid silicate we call a glaze influence the properties of that glaze.
v How uniform is the temperature in your kiln, (a) at cone drop (b) =
after twenty mins soak (c) after soaking for an hour.
vi What happens during the soaking period?
vii How do you distinguish a matt formed due to arresting the cooling =
process from one which is caused by undissolved ingredients?
As I said, Thoughts. Where do we find the answers?
Best regards and a Happy New Year.
Ivor...you know where!!!
william schran on wed 1 jan 03
Ivor posed several questions regarding glaze/clay interface, glaze
maturity, soaking and finally asked where to find the answers. I
would guess the best place to find these answers are in ceramic
industry (where uniformity and cost effectiveness are critical, thus
much research has been done) and in schools teaching ceramic
engineering.
Bill
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