Ron Collins on tue 13 nov 01
Given that glazing vitrified ware is an aesthetic choice, you can like
anything you want...pinholes, crawling, etc....on some pieces it seems to be
acceptable, where on other glazed surfaces it might not be. It is an
aesthetic choice however, and if you like it, do it.......in a glossy glaze,
pinholes are ugly to me, in a matt, not so bad, ...that's what I
think....there are several thousand people on this list that may tell you
what they think.....just do what you want....pinholes to me mean that you
don't have control of your process....Melinda Collins, Antigua, Guatemala
Luis Fontanills on tue 13 nov 01
Hello Clay Manipulators ;-)
I've read at least 50% of the archives on pinholes in glazes (and there were
quite a few ;-), and have a further question/observation. Aside from the
possible food particles/bacterial breading ground for food items, what reason
is there for viewing pinholes as an inferior surface? Even in the food
category the proper temperature and/or chemicals could sanitize such wares.
If the intent is to produce a more textural piece that reveals the nature of
the materials, and those materials produce pinholes, why is this bad? If it
functionally does not harm it and aesthetically fits within the context of
the overall piece, is it bad? Bad in what sense and why?
I've only been making ceramics for slightly over a year, but have been
painting/drawing since a child. I am also a practicing architect, and given
that my father is also an architect, grew up attuned to it. I mention this
because possibly my question may seem naive, and may well be, but a
philosophical consideration and reassessment of what pinholes are and mean
could be worthwhile. Have they been given a bad reputation out of some
convention? Should this convention be overturned or modified?
Regards,
Luis Fontanills
Miami, Florida USA
Marta Matray Gloviczki on tue 13 nov 01
luis,
i am with you on this, because i love pinholes! :-)))
but i am crazy for textures...
did you see shiho kanzaki`s new texture work?
http://www.the-anagama.com
i would not want to "correct" those crawlings and
pinholes!
but i am curious too what the experts` opinion on
this.
and how to make a shino bubble??? or that just happens
by chance or you can actually help bubbles to form?
marta
=====
marta matray glovicki
rochester,mn
http://users.skynet.be/russel.fouts/Marta.htm
http://www.silverhawk.com/crafts/gloviczki/welcome.html
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CINDI ANDERSON on tue 13 nov 01
I have found that many of my pinholes have sharp edges. That's what I don't like
about them. And also they tend to cluster on certain points and appear unnatural.
I think if you did them on purpose on a sculputural piece they would be fine.
Cindi
Luis Fontanills wrote:
> If the intent is to produce a more textural piece that reveals the nature of
> the materials, and those materials produce pinholes, why is this bad? If it
> functionally does not harm it and aesthetically fits within the context of
> the overall piece, is it bad? Bad in what sense and why?
Des & Jan Howard on wed 14 nov 01
Marta
We add PVA woodworking glue, a goodly amount, to the glaze slop,
stir with a high speed stirrer, (paint stirrer in an electric drill)
to make a very frothy mix & dip the pot in the glaze.
Looks like a milkshake (old fashioned milkshake that is),
leaves gross looking bubbles on the pot, a bugger to handle
& pack in kiln. Nett result, white crater walls, red/orange
crater floor, resembles filtered pics of sun roiling 'n boiling.
I like my shineos, reminds me of Outback Oz, red rock
& sand viewed through heat shimmer.
Sorry, no current pics of bubbled shino on our site.
Des
Marta Matray Gloviczki wrote:
> and how to make a shino bubble??? or that just happens
> by chance or you can actually help bubbles to form?
> marta
--
Des & Jan Howard
Lue Pottery
LUE NSW 2850
Australia
Ph/Fax 02 6373 6419
http://www.luepottery.hwy.com.au
Luis Fontanills on wed 14 nov 01
marta matray glovicki wrties:
<for textures... did you see shiho kanzaki`s new texture work?
http://www.the-anagama.com i would not want to "correct" those crawlings and
pinholes! but i am curious too what the experts` opinion on this. and how to
make a shino bubble??? or that just happens by chance or you can actually
help bubbles to form? marta >>
Marta,
I don't know if I love them ;-), but I don't hate them or see them as a sign
of an inferior piece if it is aesthetically woven into the nature of the
work.
Thanks for the link on Shigaraki ware - I love the textures as well obtained
in an Anagama kiln.
Cindi Anderson writes:
like about them. And also they tend to cluster on certain points and appear
unnatural. I think if you did them on purpose on a sculputural piece they
would be fine. Cindi >
Agreed Cindi, you as the artist must be the first and foremost arbiter on
whether the pinholes are appropriate to your piece.
Here is a tought experiment: possibly we could do a virtual exhibition of
ceramics that pushes textures, crawlings, pinholes, blow-outs, etc. to the
limit as a formal exploration.
Regards,
Luis Fontanills
Miami, Florida USA
Ababi on wed 14 nov 01
The glazes I try to develop now are bad glazes, I wrote to some of you
about. In general you can see in my site, that more and more I make bad
glazes. Pinholes I hardly have, yet I achieved some by combining two
glazes.
What I try to say is, the way others wrote before: If you make a
domestic ware be aware of pinholes. If you decorate your wares: Go all
the way but try not to kill your customers students and or yourself!
Using software, paying attention to the limit table, I can remember the
two glazes, among hundreds tests, that I had pinholes. I can not say
way, was it luck or my bad eyes but hardly pinholes!
One pinholes glaze, I used for my students for ^04
in this glaze the pinholes were as I made the glaze WRONG. As this is
beautiful and the pinholes give kind of thickness, perhaps nice
texture, I will add it here and you will wrack your brain how to
substitute the frit.
In general you use badly sieved badly washed wood ash. Do not try to
substitute the pine ash for pine ash, it is a barbecue ash, perhaps,
pines, apples citrus whatever.
There are pinholes and there are black dots as the ash does not melt
completely. I added 3 copper oxide like I always do. You add whatever
you want.
Frit 6004
http://www.digitalfire.com/material/m-01m1l1.htm
.LOW MOTTLED ,ASH Oxidation 1050deg.C. Cone 0
------------------------------------------------------------------------
----------------------------
Formula Weight% Recipe
------------------------------------------------------------------------
----------------------------
KNO 0.5576 17.30% FRIT 6004 41.00
CaO 0.3403 7.45% PINE ASH 20.00
MgO 0.1020 1.61% BALL CLAY AK 19.00
Al2O3 0.1844 7.33% Wollastonite 5.70
P2O5 0.0307 1.70% SILICA 9.30
B2O3 0.3682 10.00% ULTROX 15.00
SiO2 1.9088 44.77%
ZrO2 0.2006 9.64%
TiO2 0.0058 0.18%
K2O 0.3032 11.15%
Na2O 0.2544 6.16%
Al:Si 10.3511
Expan. 10.9410
ST 293.152
------------------------------------------------------------------------
----------------------------
Clay Body K-147 this is a low cost no grog white claybody
Colour
Glaze Type ash
Opacity Opaque
Texture Matte
Stability Viscous
Fit No Crazing
Last changed: 05/21/2001
Status Tested
------------------------------------------------------------------------
----------------------------
Comment:
This is an interesting matte glaze.the ash should be sieved in a 20 or
30# sieve. It makes it mottled
There is a similar frit, of Ferro Europe
FRIT FERRO FNO 143..
CaO 0.05* 1.00%
K2O 0.13* 4.04%
Na2O 0.82* 17.16%
Al2O3 0.18 6.06%
B2O3 1.07 25.23%
SiO2 2.29 46.50%
Si:Al 13.02
SiB:Al 19.13
Expan 10.92
The way I have it in Insight.
If you need help to substitute to this one e mail me. I do not think
you can buy it in North America
So back to the bad glaze Let's see with in a week or two
Ababi Sharon
Kibbutz Shoval- Israel
Glaze addict
sharon@shoval.org.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/
---------- Original Message ----------
>marta matray glovicki wrties:
><>crazy
>for textures... did you see shiho kanzaki`s new texture work? >HREF="http://www.the-anagama.com/">
>http://www.the-anagama.com i would not want to "correct" those
>crawlings and
>pinholes! but i am curious too what the experts` opinion on this. and
>how to
>make a shino bubble??? or that just happens by chance or you can
>actually
>help bubbles to form? marta >>
>Marta,
>I don't know if I love them ;-), but I don't hate them or see them as a
>sign
>of an inferior piece if it is aesthetically woven into the nature of the
>work.
>Thanks for the link on Shigaraki ware - I love the textures as well
>obtained
>in an Anagama kiln.
>Cindi Anderson writes:
> >don't
>like about them. And also they tend to cluster on certain points and
>appear
>unnatural. I think if you did them on purpose on a sculputural piece
>they
>would be fine. Cindi >
>Agreed Cindi, you as the artist must be the first and foremost arbiter
>on
>whether the pinholes are appropriate to your piece.
>Here is a tought experiment: possibly we could do a virtual exhibition
>of
>ceramics that pushes textures, crawlings, pinholes, blow-outs, etc. to
>the
>limit as a formal exploration.
>Regards,
>Luis Fontanills
>Miami, Florida USA
>________________________________________________________________________
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Luis Fontanills on thu 15 nov 01
ABABI SHARON wrote:
<about. In general you can see in my site, that more and more I make bad
glazes.>>
Ababi, those are some excellent 'bad' glazes on your web site. So bad they
are great ;-) Keep up the good work. I saved your site link to study in more
detail later.
So we can say that 'bad glazes' are characterized by non-uniformity, textural
interest, color variation and interest and general discontinuities. All these
in the right context are a wonderful expression of the nature of ceramics, a
play between control and chaos (at least what may seem like chaos to us
because it is so complex to control). We need a new term for 'bad glazes' as
a _really_ bad glaze would fall off the ceramic or fail in some essential way
to the ceramic work.
Regards,
Luis Fontanills
Miami, Florida USA
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