Derrick Pottery - owner - Wesley Derrick on mon 15 sep 03
I've been trying to find a pastel type lustery glaze like what is used by
Raku Artist: William K. Turner .
Does anyone know a glaze similar to this?
Or a way to accomplish similar results with popular sand glazes like
P.Patina or Seth's Luster?
Some examples can be found here....
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=20158&item=3550822025
or
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=20158&item=3552069751
I just made up a batch of Gun Metal this weekend and got less that happy
results....very mottled brown and orange rust color...wasn't too pleased
with Blue Black Purple either....being that.....it had none of those colors
and the ones that I did produce were more rust red/black/and blahhhh.
Both glazes were pulled at 1840F and held over the reduction bin in the
flames for 4-8 seconds and then capped and reduced for 5-8 minutes. If I
decide to retry these, I think I'll pull them quickly with no flame licking
before capping and see if a faster time to reduction works better. Any
suggestions welcome. I had heard good things about both glazes..I don't see
it.
One pleasant suprise out of the batch was a refired stoneware raku pc. that
originally had Raku Love on the inside (but with bad pinholes). I put two
coats of Gun Metal over it and refired and the results were fantastic.
Beautiful reds blues greens purples pinks all under a rainbow luster
working up from the bottom of the pot to the rim. Very glossy with crackle.
May not crackle as much on a raku body. But it's barely noticable anyway.
Does anyone have as much problem cleaning post reduction soot from pots as
I've had in the past???
Thanks for all your help.
wesley
Dewitt on thu 1 apr 04
At 06:14 PM 4/1/2004, you wrote:
>I was wondering if anyone had a copper raku glaze that was shiny not matte
>they would be willing to share? Please?!
>I have been looking for this glaze for a long time. It's almost like a
>freshly minted copper penny with flashs of other colours as well when
>heavily reduced.
>I was also wondering if anyone had a raku glaze that turns out
Take a look at Copper Penny at http://www.dinoclay.com/info/glazes/degraku.html
deg
Tren Lang on thu 1 apr 04
Hi Everyone!
I was wondering if anyone had a copper raku glaze that was shiny not matte
they would be willing to share? Please?!
I have been looking for this glaze for a long time. It's almost like a
freshly minted copper penny with flashs of other colours as well when
heavily reduced.
I was also wondering if anyone had a raku glaze that turns out almost like
a polished brass or one that is silver that breaks purple?
If anyone has any advise on raku that will get me these result even someof
the time I'm listening. I have heard from some to burp the kiln to get the
shiny coppers others have said to leave it! Which is it or is it depending
on the glaze!
Help!
Look forward to any advise!
Tren Lang
Hawkestone, ON
mudpup@rogers.com
Leland G. Hall on fri 2 apr 04
Hello Tren
Thats a good question. I use 80 per cent Gerstley Borate, 20 percent Neph
Sey, 3 to 6 percent copper carb and for what I think you are describing add
2 or 3 percent red iron oxide. Then EXPERIMENT with varied reduction
techniques and materials. Experiment with timing from kiln into
reduction. (slow vs. fast) Experiment with reducing in the kiln during
the last few minutes or so of firing. (if you are using a gas kiln) And I
think it is very important to for the beginning rakuist to keep a good and
detailed journal of every glaze and pot and firing and reduction.
I do not think that there is any one particular way to get any particular
result. That is the beauty of raku for me. Infinate varibles. I love
that. Infinite variables. Document them. Learn them. Love them and
repeat the unexpected to the degree that you can. Raku is partly a mystery
and partly a science. Much is learned from the seat of you pants so to
speak. Keep us posted. You will hear much more from others with details
of what works for them, but also you must find your own path. Best of luck.
Leland Hall
Before The Wheel Enterprises
Raku Pottery and Sculpture
La Pine, Oregon USA
Craig Dunn Clark on fri 2 apr 04
Tren, I've got one that works quite well for me. It is really glossy if
you fire it upwards of 1850F or so and will go into an opalesence if taken
higher. To get the shiny copper penny type of look that I think you are
after you need to get it into post firing reduction very quickly. I mean
like out of the kiln and into the can in a matter of seconds. Make sure your
reduction cans seal well otherwise reoxidation will occur and you will get
either green or green with copper flashes (which I actually prefer.)
I fire raku by sight so just look for a nice sheen on the side of the
pots before pulling them. If the surface is not glossy enough just fire a
bit higher the next time around. Pay attention to the color of the
atmoshpere as well as any type of pyrometric device that you may have.Try
and remember what you do.
It also helps to seal the can by placing a damp piece of paper in the
can which will give off a bit of steam thereby creating some positive
pressure for a bit to help prevent re-oxidation as well as a coupla wet
sheets of newspaper drapped across the top of the can before the lid is put
on.If you have the wet paper drapped across the back of a chair right next
to the can you can do all of this very quickly with a bit of practice. Just
play with it a bit and see what you are able to get.An able bodied assistant
is also nice to have. That way all you need to do is worry about handling
the pot and getting it in the can.
The glaze is not the most stable over the long haul. In other words it
will continue to oxidize over time. The copper will begin to fade. Different
types of sealants will prolong the process but won't stop it in hot humid
climates. I suspect that the glaze, as well as most raku glazes, is also
photo reactive.
For the real skinny on the fading of and problems of raku glazes visit
Tom Bucks article at the following link. IT is one of the most comprehensiv
explanations of our fireing woes and how to solve them I have ever read
http://www.digitalfire.ab.ca/cermat/education/113.html. He has a shinny
copper penny type of glaze listed that will most likely not fade.
The glaze that I have been using is Gerstley Borate 65%, Neph Sye 15%,
Tenn Ball Clay 5%, Flint 5%, Tin Oxide 3%, Zircopax 3%, Copper Carb 3%
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: "Tren Lang"
To:
Sent: Thursday, April 01, 2004 6:14 PM
Subject: Raku glaze request
> Hi Everyone!
>
> I was wondering if anyone had a copper raku glaze that was shiny not matte
> they would be willing to share? Please?!
> I have been looking for this glaze for a long time. It's almost like a
> freshly minted copper penny with flashs of other colours as well when
> heavily reduced.
> I was also wondering if anyone had a raku glaze that turns out almost like
> a polished brass or one that is silver that breaks purple?
> If anyone has any advise on raku that will get me these result even someof
> the time I'm listening. I have heard from some to burp the kiln to get
the
> shiny coppers others have said to leave it! Which is it or is it
depending
> on the glaze!
> Help!
>
> Look forward to any advise!
> Tren Lang
> Hawkestone, ON
> mudpup@rogers.com
>
>
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melpots@pclink.com.
william schran on fri 2 apr 04
Tren asks for a shiny copper raku glaze.....
Go to Gary Ferguson's web page: http://www.garyrferguson.com/gallery.htm
He has a list of many raku glazes to chose from and a raku newsletter.
Anybody could provide you with a shiny copper raku glaze that works
very well for them, but who knows if it would work for you. There are
so many variables to consider.
I would advise making certain you have a good melt of the glaze and
getting the pot from the kiln to post-firing reduction chamber very
quickly for the effect you seek.
Bill
Wesley Derrick - Derrick Pottery - Jackson, MS on fri 2 apr 04
One of my favorites.
Shiny Copper Penny with Color Flash
Cone: ^08-06
Texture: Gloss
Reduction time: 5-8 Minutes
Gerstley borate 75.00 70.00
Cornwall Stone 20.00 15.00
Flint 5.00 5.00
-------- --------
Totals: 100.00 100.00
Add:
Red Iron Oxide 3.00 to 5.00
Copper Carbonate 2.00 to 2.50
Cobalt Carbonate 1.50
NOTES: I fire slow to 600F and then all switches up until the melt.
I usually start watching for the melt beginning at 1550-1600F.
I sell alot of pots with this glaze.
Enjoy.
Wesley
Ivor and Olive Lewis on sat 3 apr 04
Dear Wesley
Sounds highly decorative and severely unstable.
Best regards,
Ivor Lewis. Redhill, South Australia
> Gerstley borate 75.00 70.00
> Cornwall Stone 20.00 15.00
> Flint 5.00 5.00
> -------- --------
> Totals: 100.00 100.00
>
> Add:
> Red Iron Oxide 3.00 to 5.00
> Copper Carbonate 2.00 to 2.50
> Cobalt Carbonate 1.50
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