Marianne Laino on tue 30 mar 99
Hi,
Accidentally erased a recent suggestion about protecting raku glazes from
turning green. Comment centered around the professional responsibility of
the artist to treat the work before selling it. Would you kindly send this
directly to me?
Also, if anyone else has had success with preserving the integrity of glazes
on raku-fired pieces please let me know.
Thanks!
Marianne Laino
artsymar@erols.com
Burtt on wed 31 mar 99
Marianne,
I think the question you are referring to is in the most recent
edition of Ceramics Monthly, and it is a question I had never thought
of. I would be interested to know if most potters are using something
over their luster glazes to preserve them. If so, what? Marcia Selsor
did a good job of answer the question in CM, but I'd like to know what
others think.
Steve Burtt
Ceramics Monthly
Marianne Laino wrote:
>
> ----------------------------Original message----------------------------
> Hi,
>
> Accidentally erased a recent suggestion about protecting raku glazes from
> turning green. Comment centered around the professional responsibility of
> the artist to treat the work before selling it. Would you kindly send this
> directly to me?
>
> Also, if anyone else has had success with preserving the integrity of glazes
> on raku-fired pieces please let me know.
>
> Thanks!
>
> Marianne Laino
> artsymar@erols.com
Bob Wicks on wed 31 mar 99
Marianne:
The changes in color on Raku glazes is caused by mainly contact with air. The
Copper reunites with Oxygen to give you green copper oxide. All you have to
do is to spray clear Krylon fixative on the glaze to exclude the oxygen.
There are some that say that sun light also causes some changes, however my
chemistry background does not explain this pheromone.
Bob
Marcia Selsor on wed 31 mar 99
I just answered this in April's CM Questions on the same issue. I use an
acrylic medium to seal the copper glaze. I think you must have read the CM
thing because that is exactly what I mentioned, i.e. the responsibility of the
seller to maintain the condition of the work after the sale (at least it
shouldn't change drastically once purchased)
Marcia
Marianne Laino wrote:
>
> ----------------------------Original message----------------------------
> Hi,
>
> Accidentally erased a recent suggestion about protecting raku glazes from
> turning green. Comment centered around the professional responsibility of
> the artist to treat the work before selling it. Would you kindly send this
> directly to me?
>
> Also, if anyone else has had success with preserving the integrity of glazes
> on raku-fired pieces please let me know.
>
> Thanks!
>
> Marianne Laino
> artsymar@erols.com
--
Marcia Selsor
selsor@imt.net
http://www.imt.net/~mjbmls
http://www.imt.net/~mjbmls/spain99.html
Thonas C. Curran on thu 1 apr 99
Marcia Selsor wrote:
>
> ----------------------------Original message----------------------------
> I just answered this in April's CM Questions on the same issue. I use an
> acrylic medium to seal the copper glaze. I think you must have read the CM
> thing because that is exactly what I mentioned, i.e. the responsibility of the
> seller to maintain the condition of the work after the sale (at least it
> shouldn't change drastically once purchased)
> Marcia
>
> Marianne Laino wrote:
> >
> > ----------------------------Original message----------------------------
> > Hi,
> >
> > Accidentally erased a recent suggestion about protecting raku glazes from
> > turning green. Comment centered around the professional responsibility of
> > the artist to treat the work before selling it. Would you kindly send this
> > directly to me?
> >
> > Also, if anyone else has had success with preserving the integrity of glazes
> > on raku-fired pieces please let me know.
> >
> > Thanks!
> >
> > Marianne Laino
> > artsymar@erols.com
>
> --
> Marcia Selsor
> selsor@imt.net
> http://www.imt.net/~mjbmls
> http://www.imt.net/~mjbmls/spain99.html
Just recently came upon 2 pots I had made about 25 years ago or so
which were fired in fireplace with borax-copper carb glaze, as I
recall. It was strictly an experiment for fun, and glazes did melt and
there was neat flashing, etc. They were quite dark --always had been,
in fact, since their creation and cleaning off with soap and water--and
so I decided to attack them with scouring powder. Brightness and color
were revealed, and that was after all that time with a hit or miss glaze
done in primitive firing conditions. Has anyone tried to bring back
pot coloration by getting rid of oxidation with copper cleaner or
judicious use of scouring powder? I would think that it might be like
silver tarnish... In any case, I spray my raku pieces with matte
acrylic spray to retard oxidation, and I tell customers about
possibility of fading a bit...Carolyn
Lynne Berman on thu 1 apr 99
At a recent workshop at the Clay Studio in Philadelphia, James Watkins said
that Jasco tile sealer keeps raku colors stable. It is theoretically available
at Ace Hardware stores. They also have a web site.
Lynne Berman
Marianne Laino on thu 1 apr 99
Hi Marcia,
*That's* exactly where I did ("worlds are colliding"!--but in a fun
way)...someone else pointed this out to me. This is cool though, glad you
wrote in *here* so I can ask you more specifically, why not spray a
fixative? Ever tried that?
Also was curious do you find it's just the copper raku glazes that "fade" or
others? And do you get visible brush strokes when you use the acrylic
medium?
Thanks a lot!
Marianne
-----Original Message-----
From: Marcia Selsor
To: CLAYART@LSV.UKY.EDU
Date: Wednesday, March 31, 1999 1:53 PM
Subject: Re: Preserving Raku finishes
>----------------------------Original message----------------------------
>I just answered this in April's CM Questions on the same issue. I use an
>acrylic medium to seal the copper glaze. I think you must have read the CM
>thing because that is exactly what I mentioned, i.e. the responsibility of
the
>seller to maintain the condition of the work after the sale (at least it
>shouldn't change drastically once purchased)
>Marcia
>
>Marianne Laino wrote:
>>
>> ----------------------------Original message----------------------------
>> Hi,
>>
>> Accidentally erased a recent suggestion about protecting raku glazes from
>> turning green. Comment centered around the professional responsibility of
>> the artist to treat the work before selling it. Would you kindly send
this
>> directly to me?
>>
>> Also, if anyone else has had success with preserving the integrity of
glazes
>> on raku-fired pieces please let me know.
>>
>> Thanks!
>>
>> Marianne Laino
>> artsymar@erols.com
>
>--
>Marcia Selsor
>selsor@imt.net
>http://www.imt.net/~mjbmls
>http://www.imt.net/~mjbmls/spain99.html
>
Marcia Selsor on fri 2 apr 99
I have tried the fixative. It works. I guess I feel that acrylic might last
longer(?)-no proof there except on my test piece of only acrylic that is out
in my yard. I have been using Seth's Luster with a touch of manganese in it to
promote purple. I got it from a Tom Buck article.
Many lusters use a lot of copper, I prefer around 5% and then use a sealer. I
haven't gotten brush strokes, although I do worry about it. I sometimes use an
acrylic spray.
Marcia
Marianne Laino wrote:
>
> ----------------------------Original message----------------------------
> Hi Marcia,
>
> *That's* exactly where I did ("worlds are colliding"!--but in a fun
> way)...someone else pointed this out to me. This is cool though, glad you
> wrote in *here* so I can ask you more specifically, why not spray a
> fixative? Ever tried that?
>
> Also was curious do you find it's just the copper raku glazes that "fade" or
> others? And do you get visible brush strokes when you use the acrylic
> medium?
>
> Thanks a lot!
>
> Marianne
>
> -----Original Message-----
> From: Marcia Selsor
> To: CLAYART@LSV.UKY.EDU
> Date: Wednesday, March 31, 1999 1:53 PM
> Subject: Re: Preserving Raku finishes
>
> >----------------------------Original message----------------------------
> >I just answered this in April's CM Questions on the same issue. I use an
> >acrylic medium to seal the copper glaze. I think you must have read the CM
> >thing because that is exactly what I mentioned, i.e. the responsibility of
> the
> >seller to maintain the condition of the work after the sale (at least it
> >shouldn't change drastically once purchased)
> >Marcia
> >
> >Marianne Laino wrote:
> >>
> >> ----------------------------Original message----------------------------
> >> Hi,
> >>
> >> Accidentally erased a recent suggestion about protecting raku glazes from
> >> turning green. Comment centered around the professional responsibility of
> >> the artist to treat the work before selling it. Would you kindly send
> this
> >> directly to me?
> >>
> >> Also, if anyone else has had success with preserving the integrity of
> glazes
> >> on raku-fired pieces please let me know.
> >>
> >> Thanks!
> >>
> >> Marianne Laino
> >> artsymar@erols.com
> >
> >--
> >Marcia Selsor
> >selsor@imt.net
> >http://www.imt.net/~mjbmls
> >http://www.imt.net/~mjbmls/spain99.html
> >
--
Marcia Selsor
selsor@imt.net
http://www.imt.net/~mjbmls
http://www.imt.net/~mjbmls/spain99.html
Bruce Girrell on sat 3 apr 99
I was just sitting here quietly assuming that Tony Hansen or Tom Buck would
jump into this one, but they haven't, so I'll do it for them.
Try this:
http://www.digitalfire.com/education/glaze/buckraku.htm
It's a Ceramics Review article written by Tom that explores this problem and
a more permanent solution to it than acrylic sprays.
I've been experimenting with the Red Lustre #8 for several firings now and
it seems to be holding up. Can't tell you what color it is, though, since
I've gotten everything from a gold metallic to a ruby copper red color as
well as rainbow effects.
Most recently, on a test bowl (I was testing the conditions under which a
raku glaze would/would not scar from contact with the reduction material) I
used the RL8 covered with a copper sand glaze and got the most incredible
burgundy/blue/purple w/ iridescence result I have ever seen. I'll be trying
to reproduce it this weekend.
Bruce "raku... reproduce... Hmmm.... maybe I'll do something simple like
build an atomic bomb instead" Girrell
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