Charles and Tamara Schulz on sat 11 jul 98
this morning I did an inventory of the store room at the craft center where
I work and found a rather large supply of barnard slip and gerstly borate.
does anyone have any ideas/recipes using primarily these materials? the
center doesn't have a big budget so I would like to use the supplies on
hand as much as possible. haven't used barnard slip before but I'm thinking
it might make a nice brown?
Thanks again for all your help.
Tamara
spending lots of time underwater in beautiful Okinawa
Joy Holdread on mon 13 jul 98
In a message dated 98-07-11 21:49:30 EDT, you write:
> ---------------------------Original message----------------------------
> this morning I did an inventory of the store room at the craft center where
> I work and found a rather large supply of barnard slip and gerstly borate.
> does anyone have any ideas/recipes using primarily these materials? the
> center doesn't have a big budget so I would like to use the supplies on
> hand as much as possible. haven't used barnard slip before but I'm thinking
> it might make a nice brown?
> Thanks again for all your help.
>
Barnard makes a great dk brown glaze like slip or oxide relief treatment cone
6-12. Like glaze don't use much on the surface that touches the kiln shelves.
Deeper than iron oxide I'm using it to sign pieces now it doesn't fade in the
firing like RIO.
JOY
Sheilah Bliss on mon 13 jul 98
In a message dated 7/11/98 5:49:30 PM, you wrote:
<<----------------------------Original message----------------------------
this morning I did an inventory of the store room at the craft center where
I work and found a rather large supply of barnard slip and gerstly borate.
does anyone have any ideas/recipes using primarily these materials? the
center doesn't have a big budget so I would like to use the supplies on
hand as much as possible. haven't used barnard slip before but I'm thinking
it might make a nice brown?
Thanks again for all your help.
Tamara
spending lots of time underwater in beautiful Okinawa>>
Hello Tamara -
If you also have Soda (Kona) Feldspar and Ball Clay (or EPK), you can mix up
Phoenix II, a beautiful glossy brown ^6 oxidation (electric) glaze from
Richard Zakin's ELECTRIC KILN CERAMICS. It's one of my favorites because it's
so easy to make, doesn't craze on the claybody I use the way many other gloss
glazes do, and even yields a subtle mottled design. It's surface is strong
and food safe. Looks great on white-bodied clays.
Phoenix ll
soda feldspar 30
ball clay (or EPK) 20
Barnard slip clay 20
Gerstley Borate 30
Craig Martell on mon 13 jul 98
>this morning I did an inventory of the store room at the craft center where
>I work and found a rather large supply of barnard slip and gerstly borate.
>does anyone have any ideas/recipes using primarily these materials? the
>center doesn't have a big budget so I would like to use the supplies on
>hand as much as possible. haven't used barnard slip before but I'm thinking
>it might make a nice brown?
Hi:
Barnard clay has about 36% iron in the percentage analysis. It is very high
in silica and alumina and low in flux. It's a fairly refractory slip clay.
Do some line blends with feldspars and you will probably get some brown to
dark brown and black glazes. You can also do a feldspar-whiting-barnard
triaxial and come up with some tenmokus, and other nice high iron glazes. A
triaxial with feldspar-gerstley borate-barnard will give some more fluid
glazes than the previous suggestion. Barnard has about 51% silica so you
probably won't have to add any silica to make some good durable glazes.
Barnard makes good high iron slips for underglaze accents and decoration.
Brush some on tiles and apply every glaze you use over it and see what you get.
later, Craig Martell-Oregon
Milton Markey on mon 13 jul 98
Hi There!
Bernard clay is a natural clay, which produces a toasty brown slip for pottery
made with whiteware clay, porcelan, and many other clay bodies. Simply add
water to Bernard Clay, and mix to a suitable consistency. Bernard clay dries
quickly, and tends to coagulate, so adding a small percentage of bentonite may
help to keep it smooth.
Apply Bernard Slip to "leather hard" clay, for best results. Wares coated with
Bernard slip can be fired up to cone 10. Some clear glazes may cause this slip
to "slide", so experiment with a test chip before firing a desirable pot.
I have mixed Bernard Clay with dried Navajo Wheel clay. Mix 50% B.Clay with
50% NW Clay. This produces a slip that becomes red-brown when fired to cone 6.
Experiment with these clays. Adding more NW clay (up to 75%), while
subtracting BClay proportionately produces a redder slip; adding BClay(up to
75%) to less NW Clay produces a dark brown slip. I don't recommend firing
wares coated with this mixture above cone 6.
I hope this helps you!
Milton MiltonsLin@AOL.COM
I'm cooling off from the hot afternoon heat in the High Desert. Thank goodness
for evaporative coolers!
Giddings, Maxine on mon 13 jul 98
I often use barnard right out of the box. I.e., I do lots of carving
and bas relief work. When the pieces are bisqued, I then cover them
with Barnard which I have wet until the consistency is somewhat akin to
that of milk. I then either dip the piece or sponge or somehow get into
all the recesses with Barnard. Usually, I prefer to cover the whole
piece with the liquid Barnard. Then, I take a clean, damp sponge and
remove all areas where I don't want the dark brown surface to show after
any additional glazing is completed. Usually, a good, hard rubbing will
suffice for the effect I am trying to achieve. I may do a piece only
with Barnard. Or, most times, I add other glazes of my choice to
complement the dark recesses where the Barnard remains. Of course, the
other glazes must be light enough to let the Barnard show through. I
mainly fire to cone six. But, it works well up to ten. Maxine
Giddings.
> -----Original Message-----
> From: Charles and Tamara Schulz [SMTP:schulzc@ii-okinawa.ne.jp]
> Sent: Saturday, July 11, 1998 9:49 PM
> To: Multiple recipients of list CLAYART
> Subject: recipe for barnard slip
>
> ----------------------------Original
> message----------------------------
> this morning I did an inventory of the store room at the craft center
> where
> I work and found a rather large supply of barnard slip and gerstly
> borate.
> does anyone have any ideas/recipes using primarily these materials?
> the
> center doesn't have a big budget so I would like to use the supplies
> on
> hand as much as possible. haven't used barnard slip before but I'm
> thinking
> it might make a nice brown?
> Thanks again for all your help.
>
> Tamara
> spending lots of time underwater in beautiful Okinawa
Joy Holdread on wed 15 jul 98
> have mixed Bernard Clay with dried Navajo Wheel clay. Mix 50% B.Clay with
> 50% NW Clay. This produces a slip that becomes red-brown when fired to cone
> 6.
> Experiment with these clays. Adding more NW clay (up to 75%), while
> subtracting BClay proportionately produces a redder slip; adding BClay(up
to
> 75%) to less NW Clay produces a dark brown slip. I don't recommend firing
> wares coated with this mixture above cone 6.
>
> I hope this helps you!
>
> Milton MiltonsLin@AOL.COM
I've never heard of Navajo wheel clay? Anyone?
Joy in Tucson
Tim Lynch on thu 16 jul 98
Available from IMCO (Industrial Minerals Co.)
7268 Frasinetti Road
Sacramento, CA
916-383-2811
It's a nice dark terra cotta at cone 6. Call'em, they'll send you a catalog.
Tim Lynch
>----------------------------Original message----------------------------
>> have mixed Bernard Clay with dried Navajo Wheel clay. Mix 50% B.Clay with
>> 50% NW Clay. This produces a slip that becomes red-brown when fired to cone
>> 6.
>> Experiment with these clays. Adding more NW clay (up to 75%), while
>> subtracting BClay proportionately produces a redder slip; adding BClay(up
>to
>> 75%) to less NW Clay produces a dark brown slip. I don't recommend firing
>> wares coated with this mixture above cone 6.
>>
>> I hope this helps you!
>>
>> Milton MiltonsLin@AOL.COM
>
>
>I've never heard of Navajo wheel clay? Anyone?
>Joy in Tucson
Tim Lynch
The Clay Man
748 Highline Drive
East Wenatchee, WA 98802-5606
509-884-8303
clayman@internet.wsd.wednet.edu
http://www.geocities.com/SoHo/Museum/1613
Milton Markey on thu 16 jul 98
Hi Joy!
I guess one of the benefits of living in California is that clay bodies from
local sources can be had, from just about any supplier in the state. This is
true of Navajo Wheel clay, which is a pre-mixed bagged clay I've used. I
believe Navajo Wheel is made by Aardvark Clay, of Santa Ana, CA (it certainly
can be purchased from them). When I lived in San Francisco, I purchsed it at
Leslie Ceramic Supply, in Berkeley.
Navajo Wheel, as its name implies, is a deep red clay. It is quite plastic,
and throws quite well, and is superb for hand building! It is a midrange-
firing clay (cone 6). I let a chunk of wet NW clay dry out completely, then
break the chunk apart into little bits, sieve the broken clay (60 mesh will
do), and either mix it with bernard clay, for the slip recipie I posted
earlier, or it can be used by itself as a slip clay.
Good luck to you!
Milton MiltonsLin@AOL.COM
Yucca Valley is in its heat wave. The mercury on my outdoor thermometer is
slowly nearing its apex. The birds seem cool out there in the cottonwoods and
eucaliptus branches.
ronroy@total.net (Ron Roy) on sun 19 jul 98
Just incase everyone is not aware - Barnard (Black Bird) has a fair amount
of Manganese associated with it - my current analysis says 3.3% - you will
want to limit the amount of dust and fume you breath.
>----------------------------Original message----------------------------
>> have mixed Bernard Clay with dried Navajo Wheel clay. Mix 50% B.Clay with
>> 50% NW Clay. This produces a slip that becomes red-brown when fired to cone
>> 6.
>> Experiment with these clays. Adding more NW clay (up to 75%), while
>> subtracting BClay proportionately produces a redder slip; adding BClay(up
>to
>> 75%) to less NW Clay produces a dark brown slip. I don't recommend firing
>> wares coated with this mixture above cone 6.
Ron Roy
93 Pegasus Trail
Scarborough, Ontario
Canada M1G 3N8
Tel: 416-439-2621
Fax: 416-438-7849
Web page: http://digitalfire.com/education/people/ronroy.htm
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