marianne kuiper milks on wed 8 jun 05
I made a recipe that was given to me by my friend
Ginny Johnson. It is a lovely soft blue. I made a
trial bowl, next a set of large and small bowls. They
stood out in the sun for a while (2 days after firing)
and it appears to me that they became much lighter. On
the other hand; they now look more like Ginny's
(Rosie's) Blue. The trial pot does appear to be
slightly darker. (was dipped..very thick glaze & hard
to compare)
Am I imagining things??
What can be done, if so, to prevent a change like
that? (OK...DON'T put it in the sun. I already
considered that)
Marianne Spokerstick Keramiek
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Dale Neese on thu 9 jun 05
One of the strangest requests I have encountered was a lady returning
several pieces of my pottery because she said that they had changed colors
in less than a week. Didn't look like they had to me. Didn't argue with her.
Refunded her money. Probably didn't match her sofa.
Dale Tex
"across the alley from the Alamo"
San Antonio, Texas USA
GO SPURS
dannon rhudy on thu 9 jun 05
It is difficult to know, sometimes, if we are remembering
a color correctly. Seems to me that you should make
some more blue pieces, DON'T put them in the sun,
and compare the two side by side. You will have to
pay attention to thickness of glaze, because blues get
much bluer where thick.
Meanwhile, if you find you have a glaze that is truly being
quickly bleached by the sun, don't use that glaze. There
are blue/white tiles that have lasted in the sun for centuries,
so it's possible to have a stable blue.
regards
Dannon Rhudy
>
David Berg on thu 9 jun 05
I don't know the answer, but it wouldn't surprise me if some glazes could.
I have sometimes thought that certain glazes change over time, but I have
never been quite sure that I just wasn't just imagining it.
If you think that sun can fade a glaze, then just perform a simple
experiment with a test piece. Place the test tile in the sun, mask part of
it and see if there is a difference in color between the two conditions.
David
marianne kuiper milks on thu 9 jun 05
Hey Dale,
What a great idea! A new sofa! Wow!
(I wasn't complaining, just curious)
--- Dale Neese wrote:
> One of the strangest requests I have encountered was
> a lady returning
> several pieces of my pottery because she said that
> they had changed colors
> in less than a week. Didn't look like they had to
> me. Didn't argue with her.
> Refunded her money. Probably didn't match her sofa.
>
> Dale Tex
> "across the alley from the Alamo"
> San Antonio, Texas USA
> GO SPURS
>
>
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Ron Roy on thu 9 jun 05
Hamer mentions something - under phototrophy - glazes with 15% rutile and
TiO2 - but says these glazes darken in colour when exposed to light - but
the effect is reversable ad infinitum.
RR
>I made a recipe that was given to me by my friend
>Ginny Johnson. It is a lovely soft blue. I made a
>trial bowl, next a set of large and small bowls. They
>stood out in the sun for a while (2 days after firing)
>and it appears to me that they became much lighter. On
>the other hand; they now look more like Ginny's
>(Rosie's) Blue. The trial pot does appear to be
>slightly darker. (was dipped..very thick glaze & hard
>to compare)
>
>Am I imagining things??
>
>What can be done, if so, to prevent a change like
>that? (OK...DON'T put it in the sun. I already
>considered that)
>
>Marianne Spokerstick Keramiek
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
Phone: 613-475-9544
Fax: 613-475-3513
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