Jackie Brien on tue 1 may 01
I wonder if someone can respond to this idea. I have recently started
working with two new glazes- one is a white matt and the other is a base
glaze to which I add oxides. I found that I got a more interesting result
if I layered one over the other.So I did that and it was fine but I was
always worried about contaminating the white glaze with the colored one.
So I thought why couldn't I simply mix say equal parts of both
glazes together in the same bucket - so then I would have one semi-matt
colored glaze. So I did that and it worked fine-I've adjusted proportions
some- but the result is lovely.
What I'm wondering is- I've never heard of doing this before- and
given how careful we're meant to be in measuring out just so much of a
given chemical, is there something wrong with doing this? Chemically it
seems-well sloppy at the very least.
Or maybe folks have done this all along and I just haven't heard of it.
Thanks
Jackie
Paul Lewing on wed 2 may 01
Jackie,
What you just did is the basic idea behind a line blend. You just did a
line blend with only one increment. If you had used three increments,
being 2 parts A/ 1 part B; half-and half; and 1 part A/ 2 parts B, you
might have recognised it as a line blend.
At any rate, people have been coming up with new glaze recipes in just
this way forever. It's exactly the method that Ian Currie's books are
about, and most glaze calculation programs will even do the math for
you.
You may also have noticed that what you get when you mix the two glazes
together is not necessarily the same as what you get when you overlap
them.
And the numbers in glaze recipes are usually not that critical or set in
stone. Most materials in a glaze recipe can be increased or decreased
by 5% or so without any noticeable difference. The clear glaze that I
invented for myself years ago calls for about 5% barium carbonate.
Well, last time I made up a batch, I made a test before I added it and
then went ahead and added the barium. I can see no difference in color,
clarity, surface, or fit.
Keep on mixing,
Paul Lewing, Seattle
Ababi on wed 2 may 01
This is how I explain it to my students, without any chemical education:
Tea with milk good. Coffee with milk- good, but coffee with tea Oh god
cannot be! But I say, in ceramics, it is great the connection between the
tea and coffee or cola with orange juice, Where they connect, that's the
most beautiful part of your piece.
Ababi Sharon
ababisha@shoval.ardom.co.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
----- Original Message -----
From: "Jackie Brien"
To:
Sent: Wednesday, May 02, 2001 6:24 AM
Subject: Mixing two glazes together
> I wonder if someone can respond to this idea. I have recently started
> working with two new glazes- one is a white matt and the other is a base
> glaze to which I add oxides. I found that I got a more interesting result
> if I layered one over the other.So I did that and it was fine but I was
> always worried about contaminating the white glaze with the colored one.
> So I thought why couldn't I simply mix say equal parts of both
> glazes together in the same bucket - so then I would have one semi-matt
> colored glaze. So I did that and it worked fine-I've adjusted proportions
> some- but the result is lovely.
> What I'm wondering is- I've never heard of doing this before- and
> given how careful we're meant to be in measuring out just so much of a
> given chemical, is there something wrong with doing this? Chemically it
> seems-well sloppy at the very least.
> Or maybe folks have done this all along and I just haven't heard
of it.
>
> Thanks
> Jackie
>
>
____________________________________________________________________________
__
> 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.
>
Wade Blocker on wed 2 may 01
Jackie,
This method was mentioned in a Ceramics Monthly article by Milt
Friedly,November 1991,page 53.His students tested glazes in 50:50 (percent
by weight)blends with one another. The result was many new glazes that
could be used in their studio. Mia in sunny ABQ
| |
|
