Craig Martell on sat 25 jan 03
Hey:
I doubt that anyone will read this because you are all trying to decide
what to listen to while you're working in the studio. Once again, I will
emphatically recommend Captain Beefheart and his Magic Band. My fave tune
has got to be Big Eyed Beans from Venus. Check it out!
Some glazes can be best described as "tough nuts to crack" if you are
trying for a certain aesthetic as well as impeccable function. Black
tenmokus with few or zero crystal floaters that will fit porcelain bodies
are glazes that I would call "tough nuts".
I've been working on some tenmokus to fit my porcelain body and getting
these glazes into the right expansion range is tough because they are
fluxed with feldspar and whiting which have a fairly hi expansion. Then,
we have to add a fair chunk of Iron which increases the expansion even
more. If you add a low expander such as magnesia, crystals will develop
unless you cool fast. So it goes! The other thing is "revealing" the
crazing when it happens. Real tough to see on a dark, reflective glaze
that is a tenmoku. So, I've tried some ways of bringing out the craze
lines so I could actually get a handle of the "frequency" of lines. The
finer the craze lines, the farther off from fitting. OK, to the
point! I've been using a mixture of DMSO and talc. Brush it on the
finished piece and wait until it dries, wipe off, and check thru a
magnifying lens. Bingo! As many of you know, DMSO is a very powerful
penetrating solvent and it moves the talc right down into the craze lines
and you will then get a perfect visual of what's going on in terms of glaze
fit.
I just inspected some tiles today that have gone thru the freeze/boil test
and the two week soak test and, at last, I think I have a tenmoku that fits
my porcelain.
later, Craig Martell Hopewell, Oregon
Peter Coates on mon 27 jan 03
Hey Craig...
Where does one get dmso? I've been wanting to get copper carb in craze
lines for refiring, I wonder if your "dmso" would work ...?....
Thanks
Petey in Oklahoma City
----- Original Message -----
From: "Craig Martell"
To:
Sent: Saturday, January 25, 2003 2:49 PM
Subject: crazing/tenmoku/dmso
> I've been working on some tenmokus to fit my porcelain body and getting
> these glazes into the right expansion range is tough because they are
> fluxed with feldspar and whiting which have a fairly hi expansion. Then,
> we have to add a fair chunk of Iron which increases the expansion even
> more. If you add a low expander such as magnesia, crystals will develop
> unless you cool fast. So it goes! The other thing is "revealing" the
> crazing when it happens. Real tough to see on a dark, reflective glaze
> that is a tenmoku. So, I've tried some ways of bringing out the craze
> lines so I could actually get a handle of the "frequency" of lines. The
> finer the craze lines, the farther off from fitting. OK, to the
> point! I've been using a mixture of DMSO and talc. Brush it on the
> finished piece and wait until it dries, wipe off, and check thru a
> magnifying lens. Bingo! As many of you know, DMSO is a very powerful
> penetrating solvent and it moves the talc right down into the craze lines
> and you will then get a perfect visual of what's going on in terms of
glaze
> fit.
>
> later, Craig Martell Hopewell, Oregon
Bob Santerre on mon 27 jan 03
You can purchase DMSO through most chemical suppliers, e.g., Mays
Chemical (http://www.mayschem.com/en/productline.html). You'll need to
set-up an account with them.
A word of caution: DMSO is indeed a tremendous solvent. It is also
capable of penetrating the skin and carrying anything dissolved in it
(that's dissolved, not suspended, like talc) into the body - so be
careful, wear rubber (nytril) gloves when using it.
Bob
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Peter Coates wrote:
>Hey Craig...
> Where does one get dmso? I've been wanting to get copper carb in craze
>lines for refiring, I wonder if your "dmso" would work ...?....
>
>Thanks
>Petey in Oklahoma City
>
>----- Original Message -----
>From: "Craig Martell"
>To:
>Sent: Saturday, January 25, 2003 2:49 PM
>Subject: crazing/tenmoku/dmso
>
Bruce Girrell on mon 27 jan 03
> Where does one get dmso? I've been wanting to get copper carb in craze
> lines for refiring, I wonder if your "dmso" would work ...?....
Wait, wait, wait...
I missed the first part of this, so I don't know where the DMSO idea fits
in, but DMSO has an important property that must be considered. Its ability
to diffuse throughout the human body is unequalled. If you put your finger
in it, a second later you can taste it. DMSO is a solvent and whatever it
dissolves will be transported with it throughout the body. That being said,
I doubt that DMSO will dissolve much copper carbonate (it is an organic
solvent), but this still sounds as though someone is asking for trouble.
Monona are you still around anywhere?
Edouard, any comments?
Bruce "maybe alarmed about nothing, but still alarmed" Girrell
BTW, I think you can get DMSO at "food supplement" places like GNC centers
Craig Martell on mon 27 jan 03
Pete axed:
> Where does one get dmso?
Hi Pete:
You can get dmso at a store that sells vitamins and natural
foods. Sometimes at pharmacies in large discount type stores. It usually
comes in a 70% dmso, 30% distilled water solution. I bought an 8oz bottle
for about 10 bucks. It lasts a long time.
You can also use dmso to treat various physical problems. I mix dmso and
tea tree oil to treat nail fungus infections. It works becuz the dmso will
carry the tea tree oil under the nail where the infection is occuring. It
works and it's a lot better than taking systemic drugs to deal with this
situation.
You can access all kinds of info about dmso on the web.
regards, Craig Martell Hopewell, Oregon
Ron Roy on mon 27 jan 03
Hi Craig,
Easy to see crazing by using steam - first noticed it when the mashed
potatoes hit the plate. As the steam evaporates it stays in the cracks
longer.
So - are you going to share that recipe with me or not?
It is so cold up here I am staying inside these days - getting lots of
office work done so that is good. Looking forward to spring big time.
RR
>I doubt that anyone will read this because you are all trying to decide
>what to listen to while you're working in the studio. Once again, I will
>emphatically recommend Captain Beefheart and his Magic Band. My fave tune
>has got to be Big Eyed Beans from Venus. Check it out!
>
>Some glazes can be best described as "tough nuts to crack" if you are
>trying for a certain aesthetic as well as impeccable function. Black
>tenmokus with few or zero crystal floaters that will fit porcelain bodies
>are glazes that I would call "tough nuts".
>
>I've been working on some tenmokus to fit my porcelain body and getting
>these glazes into the right expansion range is tough because they are
>fluxed with feldspar and whiting which have a fairly hi expansion. Then,
>we have to add a fair chunk of Iron which increases the expansion even
>more. If you add a low expander such as magnesia, crystals will develop
>unless you cool fast. So it goes! The other thing is "revealing" the
>crazing when it happens. Real tough to see on a dark, reflective glaze
>that is a tenmoku. So, I've tried some ways of bringing out the craze
>lines so I could actually get a handle of the "frequency" of lines. The
>finer the craze lines, the farther off from fitting. OK, to the
>point! I've been using a mixture of DMSO and talc. Brush it on the
>finished piece and wait until it dries, wipe off, and check thru a
>magnifying lens. Bingo! As many of you know, DMSO is a very powerful
>penetrating solvent and it moves the talc right down into the craze lines
>and you will then get a perfect visual of what's going on in terms of glaze
>fit.
>
>I just inspected some tiles today that have gone thru the freeze/boil test
>and the two week soak test and, at last, I think I have a tenmoku that fits
>my porcelain.
>
>later, Craig Martell Hopewell, Oregon
>
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Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
Steve Mills on wed 29 jan 03
Petey,
Try grinding copper Carb with methylated spirits on a piece of plate
glass with a palette knife until it's REALLY fine and then wiping it
into the craze lines. It's a technique we sometimes use with on-glaze
enamels to get colour into crazing. Copper Carb is too coarse as it is
commonly sold.
If the body is porous you can use spirit based wood stain to get the
same result without firing!
Steve
Bath
UK
In message , Peter Coates writes
>Hey Craig...
> Where does one get dmso? I've been wanting to get copper carb in craz=
>e
>lines for refiring, I wonder if your "dmso" would work ...?....
>
>Thanks
>Petey in Oklahoma City
>
--
Steve Mills
Bath
UK
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