Duane Archer on tue 11 feb 03
I would be interested in what other potters use as their thickness
standards for raku glazes. One of my teachers had me pour it on real thick
(1/4 inch) and it was beautiful. Since then I have tried very thin layers,
maybe two credit cards thick and they are great, -- most of the time. Some
seperation if I go thinner than two credit cards. Also, I paint my glazes --
does anyone dip ?? Thanks for any comments.
Ababi on tue 11 feb 03
If you make it out of Gerstley borate and Nepheline Syenite you can make it as thick
as you wish or thin and thick but if you make it out of frit with 5- or 10 kaolin be carful
it might peel off
Ababi Sharon
Glaze addict
Kibbutz Shoval Israel
ababisha@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
and also
http://www.israel-ceramics.org/membersGallery/personalpage.asp?MID=507
---------- Original Message ----------
> I would be interested in what other potters use as their thickness
>standards for raku glazes. One of my teachers had me pour it on real thick
>(1/4 inch) and it was beautiful. Since then I have tried very thin layers,
>maybe two credit cards thick and they are great, -- most of the time. Some
>seperation if I go thinner than two credit cards. Also, I paint my glazes --
>does anyone dip ?? Thanks for any comments.
>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org
>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/
>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
Craig Dunn Clark on tue 11 feb 03
Duanne, I primarily dip and pour my glazes. This saves me a good bit of
time when I've got a goodly number of pots to glaze and is the easiest way
for me to put an even application of glaze of the surface of the pot. As to
thickness, that depends upon the glaze in question. It has been my
experience that the standard "crackle" glossy glaze works best when the
glaze, and hence the application, is on what I consider to be the thick
side. In this instance the glaze in the bucket is somewhat thicker than
heavy cream.
In the case of the "multi-colored" raku glazes with the drier more
opalescent surfaces the glaze is much thinner. As an example I use
Pipenburgs Alligator to which I'll add a percent of Cobalt Carb. When it has
the consistency of skim milk (almost like water), it has the appearance of
some of the copper matts without the instability. If it's thicker, it takes
on the quality of an alligator skin (not to everyones taste though I like
it.)
What may be of use is to make copious notes, be consistent and
methodical. Decide what glazes you like. Work with them until you are
satified with the results and then repeat. Stick with one until you get it
right. Remember, it ain't just the thickness of the glaze. It is also the
clay body, temp to which you fire, speed at which you put the pot into
reduction, possible re-introduction of air into the post firing reduction
chamber (garbage can for many of us), and the rigor of the flame action in
the can before you close it up with a tight fitting lid. Water is also used
by many with varying effects.
There are many, many variations on this theme. Look at the books, ask
the questions, and do it a thousand times. Then do it some more.
Hope this helps
Craig Dunn Clark
619 East 11 1/2 st
Houston, Texas 77008
(713)861-2083
mudman@hal-pc.org
----- Original Message -----
From: "Duane Archer"
To:
Sent: Tuesday, February 11, 2003 9:11 AM
Subject: Raku glaze thickness??
> I would be interested in what other potters use as their thickness
> standards for raku glazes. One of my teachers had me pour it on real
thick
> (1/4 inch) and it was beautiful. Since then I have tried very thin
layers,
> maybe two credit cards thick and they are great, -- most of the time.
Some
> seperation if I go thinner than two credit cards. Also, I paint my
glazes --
> does anyone dip ?? Thanks for any comments.
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
corey on wed 12 feb 03
What I have found out is that most glazes mixed to a "half and half", or
light cream consistency do very well. However there are glazes that work
better either thinner or thicker. My "dragonfly" glaze goes on so thin I
can see the clay body through it even after two or more applications. While
my white glaze works better if it goes on quite a bit thicker. I have
noticed that if you brush on the glaze several thin coats will work way
better than one thick. This gives a better over all coverage.
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG]On Behalf Of Duane Archer
Sent: Tuesday, February 11, 2003 7:12 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Raku glaze thickness??
I would be interested in what other potters use as their thickness
standards for raku glazes. One of my teachers had me pour it on real thick
(1/4 inch) and it was beautiful. Since then I have tried very thin layers,
maybe two credit cards thick and they are great, -- most of the time. Some
seperation if I go thinner than two credit cards. Also, I paint my
glazes --
does anyone dip ?? Thanks for any comments.
____________________________________________________________________________
__
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Snail Scott on wed 12 feb 03
At 10:11 AM 2/11/03 EST, you wrote:
>...thickness
>standards for raku glazes. One of my teachers had me pour it on real
thick...I have tried very thin layers,
>...and they are great...
A lot of older recipes for raku glazes have a really
huge percentage of gerstley borate. Gerstley borate
sort of 'puffs up' when wet, and dries out that way,
so to get the same thickness of fired glaze afterward,
high-gerstley glazes need to be dipped (or brushed)
much thicker than most glazes. Nowadays, many raku
recipes are frit-based. Frit is a dense material
which takes very thin coating to achieve the same
final glaze coverage. So, a lot of people learned to
apply raku glazes thickly, but if they no longer use
gerstley glazes, the thickness is unnecessary.
-Snail
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