Johanna San Inocencio on fri 3 feb 12
I know using tin/chrome pinks or reds with other glazes containing tin =3D
are problematic, but are there concerns for using a tin glaze(yellow) on =
=3D
the same piece as a glaze with chrome green?
Johanna
ronroy@CA.INTER.NET on sat 4 feb 12
Hi Johanna,
Any chrome - anywhere in a kiln can have an effect on any glaze with
tin in it.
If you have been firing any glazes with chrome in any kiln there is a
chance tin glazes will be affected by the residual chrome - chrome
fumes in kilns and can be released again in later firings.
RR
Quoting Johanna San Inocencio :
> I know using tin/chrome pinks or reds with other glazes containing
> tin are problematic, but are there concerns for using a tin
> glaze(yellow) on the same piece as a glaze with chrome green?
> Johanna
>
John Hesselberth on sun 5 feb 12
On Feb 5, 2012, at 5:53 PM, douglas fur wrote:
> This is a fascinating part of chrome- how can some thing that's a
> refractory in the R2O3 form be vaporizing at our temps? Is it fish or =
=3D
fowl?
> DRB
> Seola Creek
Hi Douglas,
It doesn't completely vaporize, but it has a partial pressure that is =3D
high enough for a few molecules to fly around the kiln and land =3D
elsewhere. It happens with lots of materials. It just happens that =3D
chrome gets tin really excited and makes it blush.
Regards,
John
John Hesselberth
http://www.masteringglazes.com
http://www.frogpondpottery.com
douglas fur on sun 5 feb 12
RR
>
> *If you have been firing any glazes with chrome in any kiln there is a
> chance tin glazes will be affected by the residual chrome - chrome
> fumes in kilns and can be released again in later firings.
>
> *
This is a fascinating part of chrome- how can some thing that's a
refractory in the R2O3 form be vaporizing at our temps? Is it fish or fowl=
?
DRB
Seola Creek
Steve Mills on mon 6 feb 12
On 5 Feb 2012, at 22:53, douglas fur <23drb50@GMAIL.COM> wrote:
> This is a fascinating part of chrome- how can some thing that's a
> refractory in the R2O3 form be vaporizing at our temps? Is it fish or fo=
w=3D
l?
> DRB
> Seola Creek
Maybe it's good red herring!!
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my iPod=3D
Ben Morrison on mon 6 feb 12
Because of the problems with encapsulation with chrome I've never done much=
=3D
with the material. Thanks for sharing, I'll do some research into how more=
=3D
colors are made with chrome. It's not cheap, but it usually take so little=
=3D
in comparison to other colorants.=3D0A=3D0A=3D0A__________________________=
______=3D
=3D0A From: Paul Lewing =3D0ATo: Clayart@LSV.CERAMICS=
.ORG=3D
=3D0ASent: Monday, February 6, 2012 10:04 AM=3D0ASubject: Re: using tin an=
d ch=3D
rome=3D0A =3D0AOn Feb 5, 2012, at 5:00 PM, John Hesselberth wrote:=3D0A=3D0=
AIt does=3D
n't completely vaporize, but it has a partial pressure that is=3D0Ahigh eno=
ug=3D
h for a few molecules to fly around the kiln and land=3D0Aelsewhere. It hap=
pe=3D
ns with lots of materials. It just happens that=3D0Achrome gets tin really =
ex=3D
cited and makes it blush.=3D0A=3D0AChrome is amazing stuff.=3DA0 You can ma=
ke alm=3D
ost any color with it.=3DA0 Not=3D0Ajust the pink with tin and the brown wi=
th l=3D
ead that we think of and=3D0Athe green by itself, but also blue, yellow, re=
d =3D
and more.=3DA0 Guess=3D0Athat's why they named it chrome after the Greek wo=
rd f=3D
or color, chromos.=3D0A=3D0APaul Lewing=3D0Awww.paullewingtile.com=3D0Awww.=
paullewi=3D
ngart.com
Paul Lewing on mon 6 feb 12
On Feb 5, 2012, at 5:00 PM, John Hesselberth wrote:
It doesn't completely vaporize, but it has a partial pressure that is
high enough for a few molecules to fly around the kiln and land
elsewhere. It happens with lots of materials. It just happens that
chrome gets tin really excited and makes it blush.
Chrome is amazing stuff. You can make almost any color with it. Not
just the pink with tin and the brown with lead that we think of and
the green by itself, but also blue, yellow, red and more. Guess
that's why they named it chrome after the Greek word for color, chromos.
Paul Lewing
www.paullewingtile.com
www.paullewingart.com
Ben Morrison on mon 6 feb 12
Does this chrome tend to muck up other glazes in the kiln? I use a faux cel=
=3D
adon glaze with no tin, will this get green chrome blushes?=3D0A=3D0A=3D0A_=
______=3D
_________________________=3D0A From: John Hesselberth CO=3D
M>=3D0ATo: Clayart@LSV.CERAMICS.ORG =3D0ASent: Sunday, February 5, 2012 5:0=
0 PM=3D
=3D0ASubject: Re: using tin and chrome=3D0A =3D0AOn Feb 5, 2012, at 5:53 PM=
, doug=3D
las fur wrote:=3D0A=3D0A> This is a fascinating part of chrome- how can som=
e th=3D
ing that's a=3D0A> refractory in the R2O3 form be vaporizing at our temps?=
=3DA0=3D
Is it fish or fowl?=3D0A> DRB=3D0A> Seola Creek=3D0A=3D0A=3D0A=3D0AHi Doug=
las,=3D0A=3D0AIt=3D
doesn't completely vaporize, but it has a partial pressure that is high en=
=3D
ough for a few molecules to fly around the kiln and land elsewhere. It happ=
=3D
ens with lots of materials. It just happens that chrome gets tin really exc=
=3D
ited and makes it blush.=3D0A=3D0ARegards,=3D0A=3D0AJohn=3D0A=3D0AJohn Hess=
elberth=3D0Aht=3D
tp://www.masteringglazes.com=3D0Ahttp://www.frogpondpottery.com
Steve Mills on mon 6 feb 12
On 6 Feb 2012, at 01:00, John Hesselberth wrote:
Hi Douglas,
>=3D20
> It doesn't completely vaporize, but it has a partial pressure that is hig=
h=3D
enough for a few molecules to fly around the kiln and land elsewhere. It h=
a=3D
ppens with lots of materials. It just happens that chrome gets tin really e=
x=3D
cited and makes it blush.
>=3D20
> Regards,
>=3D20
> John
>=3D20
I like the idea of a Chrome Flasher/Streaker and Blushing Tin .... A sort o=
f=3D
Pyrometric Pornography,=3D20
literally "Hot stuff!"
:-)
Steve M
Steve Mills
Bath
UK
www.mudslinger.me.uk
Sent from my iPod=3D
Paul Lewing on mon 6 feb 12
On Feb 6, 2012, at 9:19 AM, Ben Morrison wrote:
Does this chrome tend to muck up other glazes in the kiln? I use a
faux celadon glaze with no tin, will this get green chrome blushes?
In my experience, chrome will blush any glaze with any opacifier. It
won't necessarily be pink, though. In one of my standard production
landscape tile images I depict a bush. I cover an area with a rutile/
iron tan glaze, scratch lines into that, and fill the lines with a
chrome/rutile green glaze. It always makes a reddish brown halo
around the green, which is why I use it. I've had faint pink blushes
happen on zirconium glazes as well from chrome.
Paul Lewing
www.paullewingtile.com
www.paullewingart.com
ivor and olive lewis on tue 7 feb 12
Dear Douglas Fur,
You say, "This is a fascinating part of chrome- how can some thing that's a
refractory in the R2O3 form be vaporizing at our temps? Is it fish or
fowl?"
None of the above apply. It is a Transitional Element, Under some condition=
s
they all have potential to react with Carbon Monoxide in the kiln to creat=
e
volatile organometallic compounds. You would need to befriend a more
knowledgeable person than me to confirm or refute the possibility that this
might happen in a potter's kiln. Search for Chromium Carbonyl in Wiki
Regards,
Ivor Lewis,
REDHILL,
South Australia
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