C Redding on tue 18 nov 97
Greetings! I have been into raku firing for the past couple of years. I
had previously been dealing mainly with the crackle glazes. But my
friend and I recently ventured into the world of matt glazes (like the
ones in CM Nov97 pg51 top) From time to time a really nice flash appears
in the reduction, but more often than not, the glazed piece turns a
brownish color. We bisque to cone 06 and fire to 1950 F (too high, I
know...that's going to be the first thing I change during the next
firing) We then leave it in the kiln chamber for a 5 minute reduction,
pull the pot, put it in an airtight chamber for an hour with a base of
newspaper, color glossy paper. For all you rakuers out there....what
have your experiences been with the matt glazes? Technical info, advice,
what-have-you would be appreciated beyond words! Thanks
Cookie Redding
cr7696@ark.ship.edu
Marcia Selsor on wed 19 nov 97
Dear Cookie,
I have been using " Dry Alligator" matt raku (CM May "97) sprayed on
thinly. I fire to 1850. I get brighter colors on cold days (-20 F) If
you let the glaze get some air,
like opening your reduction chamber and then close again, seems to
encourage
color. Someone suggested this on Clayart a while back.
Marcia in Montana
Paul Jay on sat 22 nov 97
C Redding wrote:
>
> ----------------------------Original message----------------------------
>
> Greetings! I have been into raku firing for the past couple of years. I
> had previously been dealing mainly with the crackle glazes. But my
> friend and I recently ventured into the world of matt glazes (like the
> ones in CM Nov97 pg51 top) From time to time a really nice flash appears
> in the reduction, but more often than not, the glazed piece turns a
> brownish color. We bisque to cone 06 and fire to 1950 F (too high, I
> know...that's going to be the first thing I change during the next
> firing) We then leave it in the kiln chamber for a 5 minute reduction,
> pull the pot, put it in an airtight chamber for an hour with a base of
> newspaper, color glossy paper. For all you rakuers out there....what
> have your experiences been with the matt glazes? Technical info, advice,
> what-have-you would be appreciated beyond words! Thanks
>
> Cookie Redding
> cr7696@ark.ship.edu
Just got through firing 8 hours of raku for our new studio opening
Thanksgiving weekend. Had GREAT results today (high 48F) with spraying
a VERY THIN coat of clear over a medium sprayed on coat of copper/frit
and reducing in sawdust in a garbage can with tight lid for about 15-20
min.
RAKU CLEAR An Excellent clear
that will be good in all
situations
Borax 9.10% takes Oxides well.
Crackles nicely if taken from
Gerstley Borate 36.40% the kiln quickly
and reduced.
Frit 3124 45.40%
Flint 9.10%
Sorry this is not in good form I just pasted it in from EXCEL.
Happy firing-- Paul Jay
From Western PA wher it stayed dry for me all day just so I could fire!
douglas gray on mon 24 nov 97
I could be wrong, but I have found that often times too much post fire reduction
can prevent color form forming, especially with copper flashing glazes. If you
take the piece out of the kliln and put it in a reducing chamber, I would open
the lid after a few minutes. Be careful, the flames will burst out as you lift
the lid, but then they die down.
If you watch the flames move over the surface of the pots, you can see the
copper flashing different colors. You can use a spray bottle or hose and try to
freeze the color when you see something you like, or you can just put the lid
back on and let it smoke some more. This combination of smoking and flaming,
has given me some very interesting results, where as just letting the piece sit
in the chamber, smoking until it cools completely, often results in dull
brownish surfaces.
just an observation,
doug
In message Paul Jay writes:
> ----------------------------Original message----------------------------
> C Redding wrote:
> >
> > ----------------------------Original message----------------------------
> >
> > Greetings! I have been into raku firing for the past couple of years. I
> > had previously been dealing mainly with the crackle glazes. But my
> > friend and I recently ventured into the world of matt glazes (like the
> > ones in CM Nov97 pg51 top) From time to time a really nice flash appears
> > in the reduction, but more often than not, the glazed piece turns a
> > brownish color. We bisque to cone 06 and fire to 1950 F (too high, I
> > know...that's going to be the first thing I change during the next
> > firing) We then leave it in the kiln chamber for a 5 minute reduction,
> > pull the pot, put it in an airtight chamber for an hour with a base of
> > newspaper, color glossy paper. For all you rakuers out there....what
> > have your experiences been with the matt glazes? Technical info, advice,
> > what-have-you would be appreciated beyond words! Thanks
> >
> > Cookie Redding
> > cr7696@ark.ship.edu
> Just got through firing 8 hours of raku for our new studio opening
> Thanksgiving weekend. Had GREAT results today (high 48F) with spraying
> a VERY THIN coat of clear over a medium sprayed on coat of copper/frit
> and reducing in sawdust in a garbage can with tight lid for about 15-20
> min.
> RAKU CLEAR An Excellent clear
> that will be good in all
> situations
>
> Borax 9.10% takes Oxides well.
> Crackles nicely if taken from
> Gerstley Borate 36.40% the kiln quickly
> and reduced.
> Frit 3124 45.40%
> Flint 9.10%
> Sorry this is not in good form I just pasted it in from EXCEL.
> Happy firing-- Paul Jay
============================================================================ =)
Douglas E. Gray
Assistant Professor of Art, Ceramics
Francis Marion Univeristy
Florence, South Carolina 29501
dgray@fmarion.edu
| |
|
