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saggar, salt and raku firings

updated sun 27 may 07


Eduardo Lazo on sat 26 may 07

=E2=80=9CI remember someone telling me awhile ago even though they are in a=20=
that the salts and other chemicals used would affect the later Raku firings.=
Dear Diane, =20
Sodium Chloride starts to become active when the temperature inside your=20
saggar is approximately 1400 degrees Fahrenheit. Salt vapors escape the sag=
and swirl inside your raku kiln leaving residue on the kiln walls (brick or=20
fiber). This residual salt will affect the unglazed surfaces of pots in=20
subsequent raku firings. You will see mottled gray patterns where you would=
want black blacks. If you like this phenomenon, so be it. If you do not wa=
this to happen, =E2=80=9Cclean=E2=80=9D your raku kiln prior to a regular ra=
ku session by=20
firing it to 1800 degrees Fahrenheit. This will remove most of the residual=
left behind from your saggar. =20
So, yes, you can use one kiln for both techniques. However, it is nice to=20
have dedicated kilns for each. =20
Eduardo Lazo=20
Belmont, California=20

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