Lili Krakowski on wed 15 dec 10
What is a "liner" glaze?
The term seems to be of recent usage, describing a glaze fit to be =3D
used on the inside of a functional pot. I looked in RonJohn's book, and =
=3D
they use the term for durable, non crazing, pinholing, crawling etc =3D
glazes that do not get marked up by spoons and the like, and do not =3D
leach, discolor etc In other words GOOD PROPER GLAZES.
I may have encountered the term before applied to glazes/slip glazes =3D
used on then inside of butter churns, butter crocks and the like, where =3D
the outside was left bare to be salt glazed.
But I find the label distressing. For one--and we all know this--a =3D
glaze can be "challenged" and become "overwrought" from application to =3D
a clay body that, as it were, sabotages it. A clay body that absorbs =3D
too much liquid, or is badly designed in some other way, will make a =3D
perfectly good glaze craze, even shiver. For another, a good glaze for =3D
a functional pot should meet all the requirements for stability, =3D
durability, safety and so on, whether used outside or inside a pot. The =
=3D
notion that if you use a safe glaze on the inside, it is perfectly ok to =
=3D
use unsafe glazes on the outside appalls me. =3D20
It appalls me because so many of us work in shared studios and the level =
=3D
of experience and knowledge varies from participant to participant, =3D
allowing a novice to "copycat" s/he saw an experienced potter do, and =3D
create havoc. My rants against unsafe glazes used anywhere except in =3D
studios used only by those who make decorative ware do no need =3D
repeating. (By the way, are you all, Christmas shopping out there, =3D
reading the labels on imported crockery?)
I just wish the "liner" term would disappear That we would use "good, =3D
durable, functional ware, food safe" for glazes instead, and leave =3D
"liner" to the Cunard Line and shower curtains.
Lili Krakowski
Be of good courage
Randall Moody on wed 15 dec 10
I think that the point of a liner glaze is to be all of what you say
but there is no such requirement for the glaze on the exterior of a
pot even when the pot is "functional", if the crazing and crawling is
the desired effect. I have a few celadons that craze and they are
"good, proper glazes" because that is the effect I want. A crazed
glaze and even a crawled glaze is not automatically an "unsafe" glaze.
--=3D20
Randall in Atlanta
http://wrandallmoody.com
On Wed, Dec 15, 2010 at 4:10 PM, Lili Krakowski w=
=3D
rote:
> What is a "liner" glaze?
>
> =3DA0The term seems to be of recent usage, describing =3DA0a glaze fit to=
be =3D
used on the inside of a functional pot. =3DA0I looked in RonJohn's book, an=
d =3D
they use the term =3DA0for durable, non crazing, pinholing, crawling etc gl=
az=3D
es that do not get marked up by spoons and the like, and do not leach, disc=
=3D
olor etc =3DA0 In other words GOOD PROPER GLAZES.
>=3DA0For another, a good glaze for a functional pot should meet all the re=
qu=3D
irements for stability, durability, safety and so on, whether used outside =
=3D
or inside a pot. =3DA0The notion that if you use a safe glaze on the inside=
, =3D
it is perfectly ok to use unsafe glazes on the outside appalls me.
>
> It appalls me because so many of us work in shared studios and the level =
=3D
of experience and knowledge varies from participant to participant, allowin=
=3D
g a novice to "copycat" s/he saw an experienced potter do, and create havoc=
=3D
. =3DA0My rants against unsafe glazes used anywhere except in studios used =
on=3D
ly by those who make decorative ware do no need repeating. =3DA0(By the way=
, =3D
are you all, Christmas shopping out there, reading the labels on imported c=
=3D
rockery?)
>
> I just wish the "liner" term would disappear =3DA0That we would use "good=
, =3D
=3DA0durable, functional ware, food safe" for glazes instead, and leave "li=
ne=3D
r" to the =3DA0Cunard Line and shower curtains.
>
>
>
>
>
> Lili Krakowski
> Be of good courage
>
Eric Hansen on thu 16 dec 10
The concept of "liner" glaze was impressed on me in conjunction with
the production of "cassaroles" which are used for serving of "covered
dishes" which often contain meat or other food stuffs of which the
highest level of sanitary wares are called for. So for example if you
cook Tuscan beef shank simmered for 8 hours in sangiovese wine, serve
it in your Ron Roy approved cassarole, and subsequently refrigerate it
IN THE SAID cassarole, you need not worry about e-coli or other
intrepid hangers-on invading the clay body to emerge yet later when
the cassarole is used for mole chicken or sambhar masala lamb.
- h a n s e n -
On Wed, Dec 15, 2010 at 9:26 PM, Randall Moody wr=
=3D
ote:
> I think that the point of a liner glaze is to be all of what you say
> but there is no such requirement for the glaze on the exterior of a
> pot even when the pot is "functional", if the crazing and crawling is
> the desired effect. I have a few celadons that craze and they are
> "good, proper glazes" because that is the effect I want. A crazed
> glaze and even a crawled glaze is not automatically an "unsafe" glaze.
>
> --
> Randall in Atlanta
> http://wrandallmoody.com
>
>
>
> On Wed, Dec 15, 2010 at 4:10 PM, Lili Krakowski =
=3D
wrote:
>> What is a "liner" glaze?
>>
>> =3DA0The term seems to be of recent usage, describing =3DA0a glaze fit t=
o be=3D
used on the inside of a functional pot. =3DA0I looked in RonJohn's book, a=
nd=3D
they use the term =3DA0for durable, non crazing, pinholing, crawling etc g=
la=3D
zes that do not get marked up by spoons and the like, and do not leach, dis=
=3D
color etc =3DA0 In other words GOOD PROPER GLAZES.
>
>>=3DA0For another, a good glaze for a functional pot should meet all the r=
eq=3D
uirements for stability, durability, safety and so on, whether used outside=
=3D
or inside a pot. =3DA0The notion that if you use a safe glaze on the insid=
e,=3D
it is perfectly ok to use unsafe glazes on the outside appalls me.
>>
>> It appalls me because so many of us work in shared studios and the level=
=3D
of experience and knowledge varies from participant to participant, allowi=
=3D
ng a novice to "copycat" s/he saw an experienced potter do, and create havo=
=3D
c. =3DA0My rants against unsafe glazes used anywhere except in studios used=
o=3D
nly by those who make decorative ware do no need repeating. =3DA0(By the wa=
y,=3D
are you all, Christmas shopping out there, reading the labels on imported =
=3D
crockery?)
>>
>> I just wish the "liner" term would disappear =3DA0That we would use "goo=
d,=3D
=3DA0durable, functional ware, food safe" for glazes instead, and leave "l=
in=3D
er" to the =3DA0Cunard Line and shower curtains.
>>
>>
>>
>>
>>
>> Lili Krakowski
>> Be of good courage
>>
>
--=3D20
Eric Alan Hansen
Stonehouse Studio Pottery
Alexandria, Virginia
americanpotter.blogspot.com
thesuddenschool.blogspot.com
hansencookbook.blogspot.com
"Simplify, simplify, simplify" - Thoreau
Lee Love on thu 16 dec 10
Liner glazes are the age old way of dealing with large kilns
that have a range of firing temps but also in salt fired work, which
was often fired with no glazes on the outside at all (you only "lined"
the pot with a glaze on the inside.)
You don't hear too much about them these days, with folks
complaining about "uneven firing" kilns that have a half cone
difference between the top and bottom temps.
Here in the USA we used Albany slip in functional ware. In
Mashiko, they use Mashiko Kaki as a liner glaze. These slip glazes
have a wide range of maturity and help keep "underfired" work from
leaking. Of course, if you only fire in a computer controlled
electric kiln, you might not be exposed to this practice.
Related to Mel's mentioning of white on the inside, which
does enhance the color of drinks, especially tea, I picked up the
practice of doing hakame white slip on the inside of pots made with
dark clay. I also do it on the outside for color variation and a way
to decorate before you bisque.
--
=3DA0Lee, a Mashiko potter in Minneapolis
http://mingeisota.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
Vince Pitelka on thu 16 dec 10
Traditionally (and still today as far as I know), liner glazes are just
stable, food-safe glazes for the interior of utilitarian ware. White and
other light colors are most popular for obvious reasons, as Mel pointed out=
,
but for midrange and high-fired reduction, salt, soda, and wood, I like
temmoku, kaki, and an olive celadon as liners. It is all a matter of
personal preference, and any stable semi-gloss or gloss-surface glaze will
work fine as a liner, regardless of the color. There are plenty of stable
semi-matts and matts, but I have never liked to use them as liners.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka
Lee Love on thu 16 dec 10
On Thu, Dec 16, 2010 at 9:29 AM, Lee Love wrote:
> was often fired with no glazes on the outside at all (you only "lined"
> the pot with a glaze on the inside.)
One way developed to get the crazed look, is using a crackle slip
like Rhodes leather hard slip on bisque ware. Then you glaze with a
non-crazing transparent glaze over the slip. Ash glaze works well
with this.
--
=3DA0Lee, a Mashiko potter in Minneapolis
http://mingeisota.blogspot.com/
=3D93Observe the wonders as they occur around you. Don't claim them. Feel
the artistry moving through and be silent.=3D94 --Rumi
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