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to wash or not to wash

updated thu 7 jun 07

 

ClayCoyote@aol.com on tue 26 nov 96

Bob Hanlin, et al.

Noting the thread (again) re kiln wash, we picked up a tip from Bob Briscoe
near Mpls to not kiln wash at all. Clean feet up well, watch for the runny
glaze combinations, and with a little care, you can flip the shelves every
firing, not mess with wash at all, and have no sticking problems. The use of
sand is not necessary except for some porcelains.

If a bit of glaze does fall, a light grinding with a right angle grinder
takes care of it....maybe with a touch of wash or alumina to keep the next
foot from sticking.
Does anyone else do this? We've tried it, (cone 10 gas and electric) and it
seems to work. Shelves last much longer. Haven't had any problem with glaze
seepage when the shelf is flipped. We use a c10 white stoneware that is
predominantly fireclay.


Tom Wirt
Clay Coyote Pottery
Hutchinson MN
ClayCoyote@aol.com

Gerry Barbe on wed 27 nov 96


The use of kiln wash must depend on the clay body. If I use bare shelves
in a glaze fire chunks of the pot stick to the shelf! I use a cone 6
stoneware with porcelain like characteristics. Even when the wash thins
out after a while the pots come out with chunks missing. Makes for a lot
of seconds. I'll post Robert Tetu's Kiln Wash recipe tonight. It's the
best. Marilyn in Ailsa Craig

Gerry Barbe - gbarbe@julian.uwo.ca
Dept. OB/GYN
University of Western Ontario
London, Ontario, CANADA
______________________________________________________________________________

Sam Kelly on sun 13 jun 04


Hi, firstly my email address no longer is working so all answers post here please, Thanks, Sam

Ash, should I wash it or not before using in a glaze, I have read heaps on it but can someone tell me is there a major difference between washed and non washed hardwood ash.

Sam

Peter Coates on tue 5 jun 07


The subject of washing your ashes comes up now and then. (for those
who may not know, for ash glazes some people think you should wash
the ash, while others feel washing the ash is horrible)

i had the idea a while back when the subject had come up , but i
just now tried it out. i soaked a test tile in the dark ash water
after the ash had settled for a week for about sixty seconds. Though
this is antodotal i can now say that the soluables from the ash water
definitly have a effect. the test tile flashed a soft orange/brown.
the effect was similar to soda ash water test i have done. the
flashing traveled to the outside of the extruded B-Mix tube. there
were no crystals on the outside of the bisque after drying. the
bisque tube looked just like a bisque tube with a little bit of
discoloration.

any way
just thought it was interesting.

Peter
Oklahoma City

Hank Murrow on wed 6 jun 07


On Jun 5, 2007, at 8:10 PM, Peter Coates wrote:

> The subject of washing your ashes comes up now and then. (for those
> who may not know, for ash glazes some people think you should wash
> the ash, while others feel washing the ash is horrible)
>
> i had the idea a while back when the subject had come up , but i
> just now tried it out. i soaked a test tile in the dark ash water
> after the ash had settled for a week for about sixty seconds. Though
> this is antodotal i can now say that the soluables from the ash water
> definitly have a effect. the test tile flashed a soft orange/brown.
> the effect was similar to soda ash water test i have done. the
> flashing traveled to the outside of the extruded B-Mix tube. there
> were no crystals on the outside of the bisque after drying. the
> bisque tube looked just like a bisque tube with a little bit of
> discoloration.
>
> any way
> just thought it was interesting.

More than interesting, Peter.......... informative and revelatory.

If more folks would simply try a little experiment like the one you
devised, they would learn a lot faster, and with less reliance on
answers 'from the gurus'. A thousand such experiments, and you will
BE a guru.

Bravo! & Cheers!!

Hank
www.murrow.biz/hank

Lee Love on thu 7 jun 07


On 6/6/07, Peter Coates wrote:
> The subject of washing your ashes comes up now and then. (for those
> who may not know, for ash glazes some people think you should wash
> the ash, while others feel washing the ash is horrible)

The reasons for washing wood ash are to remove the caustic soluables
to save your skin while glazing. To help the glaze be more
consistent: if your glaze is 50% ash like mine is, and you leave
solubles in, a trash can of glaze you end up with is not the same as
what you begin with, especially if you add water during the glazing
process and ladle off the top water before you begin glazing. Wet
sieving is safer because you are not putting ash dust into the air
(always wear a mask when dry sieving.)

Seashell covered wads makes nice flashing on the feet.

--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://mashikopots.blogspot.com/

"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau

"Let the beauty we love be what we do." - Rumi