jnybravo2 on fri 13 jun 03
Hi all, I am a clayart list lurker, and a newbie to pottery. I am
just starting to mix my own glazes. I fire cone 6 oxidation. The
first time I fired floating blue, the pots turned out brown. The
clayart archives had info that suggested the glaze was not heavy
enough. So, the next firing I double dipped the floating blue pieces.
This time the color was great, but the glaze ran off the pots and
puddled on the bottom. Thanks to suggestions I read on clayart, I
apply kiln wash really heavy so my shelves are ok. The pots, however
were a mess. I have ground off the excess glaze from the bottom of
the pieces and now the finish now looks really bad. My question is,
can I refire to cone 6 without messing up the color? Will the glaze
smooth out where the excess was ground off? Or should I just forget
about them and move on. Thanks in advance for your time and
suggestions. I am really enjoying my journey in clay, and have
already learned so much monitoring this list.
Regards, John in Saxapahaw, North Carolina
Ababi on fri 13 jun 03
>Hi all, I am a clayart list lurker, and a newbie to pottery. I am
>just starting to mix my own glazes. I fire cone 6 oxidation. The
>first time I fired floating blue, the pots turned out brown.
---------- End of Original Message ----------
Hello brother
========
There are so many beautuful fish in the ^6 pond.
Why do you want exactly the shark?
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.israel-ceramics.org/membersGallery/personalpage.asp?MID=507
John Rodgers on fri 13 jun 03
John, in my experience Floating Blue IS NOT a cone 6 glaze, but a very
cool Cone 5. In my notes, it says "Fires brown where thin, Snot Green
when fired to hot. Also runs like crazy when fired to the point where a
free standing shelf cone 5 points down.
I use the free standing shelf or witness cones, and I fire this glaze
manually. That is, I watch what the cone is doing by looking at it
through the peep hole. IN MY KILN, when a #5 cone bends to a position
off of vertical to a point 30 degrees from horizontal, the Floating Blue
is mature, and perfect on my clay. I then shut the kiln down.
Took me a while to work this out and I got lots of snot green work and
glaze on my shelves. Now-a-days virtually every Floating Blue fireing is
perfect. I do like the glaze.
Regards,
John Rodgers
Birmingham, AL
jnybravo2 wrote:
>Hi all, I am a clayart list lurker, and a newbie to pottery. I am
>just starting to mix my own glazes. I fire cone 6 oxidation. The
>first time I fired floating blue, the pots turned out brown. The
>clayart archives had info that suggested the glaze was not heavy
>enough. So, the next firing I double dipped the floating blue pieces.
>This time the color was great, but the glaze ran off the pots and
>puddled on the bottom. Thanks to suggestions I read on clayart, I
>apply kiln wash really heavy so my shelves are ok. The pots, however
>were a mess. I have ground off the excess glaze from the bottom of
>the pieces and now the finish now looks really bad. My question is,
>can I refire to cone 6 without messing up the color? Will the glaze
>smooth out where the excess was ground off? Or should I just forget
>about them and move on. Thanks in advance for your time and
>suggestions. I am really enjoying my journey in clay, and have
>already learned so much monitoring this list.
>Regards, John in Saxapahaw, North Carolina
>
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>
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>
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
>
>
>
Carol Tripp on sat 14 jun 03
Hi John,
Building up a repetoire of glazes takes time, information (Ron & John's ^6
book for starters), an optimistic outlook and the ability to dump a fussy
glaze like floating blue until you are much further along in your quest.
Why swim with the sharks as Ababi put it? Stay in the shallow end with the
minnows and then tackle the floating blues and such later. I am writing
from experience having made Floating Blue as one of my first ever glazes;
into the gash bucket it went after testing. Four years on and I still
haven't gotten back to it because I have found so many other things on the
way. I no longer waste my time on 'pain in the arse' glazes UNLESS they are
too potentially exciting to kill off. That's why I have a separate notebook
just for those particular glaze quests. And when I have lots of spare
time... I'll jump in.
Best regards,
Carol
Dubai, UAE
John wrote:
>Hi all, I am a clayart list lurker, and a newbie to pottery. I am
>just starting to mix my own glazes. I fire cone 6 oxidation. The
>first time I fired floating blue, the pots turned out brown. The
>clayart archives had info that suggested the glaze was not heavy
>enough. So, the next firing I double dipped the floating blue pieces.
>This time the color was great, but the glaze ran off the pots and
>puddled on the bottom. Thanks to suggestions I read on clayart, I
>apply kiln wash really heavy so my shelves are ok. The pots, however
>were a mess. I have ground off the excess glaze from the bottom of
>the pieces and now the finish now looks really bad. My question is,
>can I refire to cone 6 without messing up the color? Will the glaze
>smooth out where the excess was ground off? Or should I just forget
>about them and move on. Thanks in advance for your time and
>suggestions. I am really enjoying my journey in clay, and have
>already learned so much monitoring this list.
>Regards, John in Saxapahaw, North Carolina
>
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L. P. Skeen on sat 14 jun 03
the next firing I double dipped the floating blue pieces.
> >This time the color was great, but the glaze ran off the pots and puddled
on the bottom. I have ground off the excess glaze from the bottom of the
pieces and now the finish now looks really bad. My question is,
> >can I refire to cone 6 without messing up the color?
John, you should forget about these pots and move on; you're spending too
much time trying to fix a booboo. Floating Blue is a very picky glaze, and
the parts where the glaze has run down will just run further if you fire
them again. OTOH, you could just keep firing them til all the glaze has run
off..........
You don't want FB to be any thicker than whole milk in the bucket, and give
your pieces a smooth, even, in-and-out dip - don't hold 'em under more than
a second or the coating will be too thick and run off. I saw where someone
fired their FB to ^8, but I have never been able to fire it higher than 6
without bubbles and snot . FB is beautiful when done right, and
HEINOUS any other time.
L
Ababi on sun 15 jun 03
From my reading in Clayart in the last year I came to the conclusion that this glaze
needs fast cooling. Bingo
My kiln cools slow therefore I got it ugly brown.
in this pagehttp://members4.clubphoto.com/ababi306910/912566/
I have my combination
a glaze similar to floating blue above a low alumina glaze. You may try my recipe you
can try your ^04 clear gloss.
http://members4.clubphoto.com/ababi306910/185990/
The almost last slide.
Because John you have this bucket try to use it.
I am a glaze addict I tested many glazes. I understand glazing pretty good compare to
the few years I am a potter. However for a one extra ordinary skillful glaze I shall not
buy a special fast cooling kiln.
This Recipe was published in the PMI
SPECKLED BLUE GRAY
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1222 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Gerstley Borate 20.00
Nepheline Syenite 20.00 was feldspar
FRIT 3110 15.00
BALL CLAY AK 15.00
SILICA 30.00
Cobalt Oxide 3.00 the original had 1 cobalt
Red Iron Oxide 1.50
Titanium Dioxide 5.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.418 6.60%
CaO 0.458 6.07%
MgO 0.124 1.18%
Al2O3 0.449 10.80%
B2O3 0.336 5.52%
SiO2 4.548 64.55%
TiO2 0.280 5.28%
K2O 0.063 1.40%
Na2O 0.355 5.20%
Al:Si 10.13
Expan. 7.48
ST 338.03
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Now the Floating blue!
FLOATING BLUE
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Cone 6 1222 deg.C. -
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Gerstley Borate 26.99
Nepheline Syenite 47.30
EPK Kaolin 5.39
SILICA 20.30
Cobalt Oxide 1.00
Red Iron Oxide 2.00
Rutile 4.00
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Seger Weight%
KNO 0.439 8.41%
CaO 0.456 7.13%
MgO 0.105 1.18%
Al2O3 0.501 14.22%
P2O5 0.000 0.01%
B2O3 0.364 7.05%
SiO2 3.452 57.79%
TiO2 0.189 4.20%
K2O 0.093 2.43%
Na2O 0.346 5.98%
Al:Si 6.89
Expan. 8.16
ST 339.34
,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,
Please note: very similar glazes: see the last slide ( + memories from the other side of
the world!)
Ababi
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