search  current discussion  categories  glazes - specific colors 

bright blue sky glaze - help needed

updated mon 19 aug 02

 

Greg Lamont on sat 17 aug 02


Hi Luba,

I've had pretty good luck with this glaze. Some of my earliest pieces
with this glaze came out as you described which I diagnosed as the
slurry being too thin. In my experience, it needs to be applied a
good thickness for best color development. I let it settle and
removed the excess water until the slurry in the glaze bucket was
about the consistency of heavy cream such that a 4-second dip results
in coat that is a credit card's thickness or slightly more when dry.
Hope this helps.
Greg

----- Original Message -----
From: "luba@mudfire.com"
To:
Sent: Saturday, August 17, 2002 4:05 PM
Subject: bright blue sky glaze - help needed


> Hello everyone! I've spent the last three months getting the
MudFire
> studio/gallery open... and it finally is! It's been a wonderful
experience
> and I'm very pleased with the outcome. So any of you living nearby
> (Atlanta, GA) or travelling through, please stop by. We're always
well
> stocked with candy!!!
>
> So now, of course, I have a plea for help from the glaze gurus.
I've mixed
> a number of Ron and John's glazes for use in the studio (a little
pricey by
> the bucket, but very much worth it.) Our members love them! But
I've been
> having problems with one of them... which is odd, since the other
glazes
> made with the same base (glossy base 1) are working out well.
"Bright blue
> sky" seems to be separating directly on the pots during firing. I
don't
> think it's caused by varying heatwork or thickness of application...
it
> occurs on all shelf levels, almost randomly inside and outside the
pots.
> All of the blue color literally flows to one side (very rich and
pretty
> color too - matches the pictures in the book exactly!) ...and the
rest of
> the pot remains covered with a translucent yellowish gloss.
>
> We're firing to a true cone 6, using the slow cooling method
described in
> the book. All of the other glazes are turning out beautifully. Any
> thoughts? Or is this one just not meant to be?
>
> thanks so much!
> Luba
>
> MudFire
> Open Studio * Gallery * Workshops
> www.mudfire.com
> 404-969-3260
>
>
______________________________________________________________________
________
> 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.
>

Ron Roy on sat 17 aug 02


Hi Luba,

My guess would be application - if you look at the mugs on page 95 where
the glaze is breaking thin on the rims - is that the colour you see? If so
you need to take some of the water off that glaze before using it.

I simply can't think of what eles it could be.

RR

>Hello everyone! I've spent the last three months getting the MudFire
>studio/gallery open... and it finally is! It's been a wonderful experience
>and I'm very pleased with the outcome. So any of you living nearby
>(Atlanta, GA) or travelling through, please stop by. We're always well
>stocked with candy!!!
>
>So now, of course, I have a plea for help from the glaze gurus. I've mixed
>a number of Ron and John's glazes for use in the studio (a little pricey by
>the bucket, but very much worth it.) Our members love them! But I've been
>having problems with one of them... which is odd, since the other glazes
>made with the same base (glossy base 1) are working out well. "Bright blue
>sky" seems to be separating directly on the pots during firing. I don't
>think it's caused by varying heatwork or thickness of application... it
>occurs on all shelf levels, almost randomly inside and outside the pots.
>All of the blue color literally flows to one side (very rich and pretty
>color too - matches the pictures in the book exactly!) ...and the rest of
>the pot remains covered with a translucent yellowish gloss.
>
>We're firing to a true cone 6, using the slow cooling method described in
>the book. All of the other glazes are turning out beautifully. Any
>thoughts? Or is this one just not meant to be?
>
>thanks so much!
>Luba

Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513

luba@mudfire.com on sat 17 aug 02


Hello everyone! I've spent the last three months getting the MudFire
studio/gallery open... and it finally is! It's been a wonderful experience
and I'm very pleased with the outcome. So any of you living nearby
(Atlanta, GA) or travelling through, please stop by. We're always well
stocked with candy!!!

So now, of course, I have a plea for help from the glaze gurus. I've mixed
a number of Ron and John's glazes for use in the studio (a little pricey by
the bucket, but very much worth it.) Our members love them! But I've been
having problems with one of them... which is odd, since the other glazes
made with the same base (glossy base 1) are working out well. "Bright blue
sky" seems to be separating directly on the pots during firing. I don't
think it's caused by varying heatwork or thickness of application... it
occurs on all shelf levels, almost randomly inside and outside the pots.
All of the blue color literally flows to one side (very rich and pretty
color too - matches the pictures in the book exactly!) ...and the rest of
the pot remains covered with a translucent yellowish gloss.

We're firing to a true cone 6, using the slow cooling method described in
the book. All of the other glazes are turning out beautifully. Any
thoughts? Or is this one just not meant to be?

thanks so much!
Luba

MudFire
Open Studio * Gallery * Workshops
www.mudfire.com
404-969-3260