Jump to content


Photo

need a good kiln wash recipe for cone 6


  • Please log in to reply
18 replies to this topic

#1 oldlady

oldlady

    single firing an electric kiln to cone 6

  • Members
  • PipPipPip
  • 887 posts
  • Locationharpers ferry west va and pinellas park fl

Posted 26 October 2012 - 10:53 PM

have not had to put kiln wash on shelves for so many years that i have lost my original recipe. it only had two ingredients. now that i have new shelves, i have checked my pretty extensive library of books going back to the 1970s and haven't found anything. i have tried to find something posted here but after looking for anything with the words "kiln wash" and "recipe" tons of stuff shows up, none of which are kiln wash recipes. yes, i am old and hate computers but really, it is a simple question. i just can't find a simple answer.

who knows, maybe someone has developed a newer recipe that is better? any thoughts???
"putting you down does not raise me up."

#2 Mark McCombs

Mark McCombs

    Advanced Member

  • Members
  • PipPipPip
  • 123 posts
  • LocationSW Washington

Posted 26 October 2012 - 11:39 PM

Perhaps some of these recipes will work for you.


:)
Mark
Fast Hawk Pottery


^5-6 Ox
1227 Skutt

#3 oldlady

oldlady

    single firing an electric kiln to cone 6

  • Members
  • PipPipPip
  • 887 posts
  • Locationharpers ferry west va and pinellas park fl

Posted 26 October 2012 - 11:49 PM

Perhaps some of these recipes will work for you.


Posted Image


thank you! in reading the ingredients needed, i find that i have no calcined EPK and zircopax is so scarce i do not want to use it for wash since i need it in glazes.

is there anything else, anybody?
"putting you down does not raise me up."

#4 Mark C.

Mark C.

    Advanced Member

  • Members
  • PipPipPip
  • 2,808 posts
  • LocationNear Arcata Ca-redwood rain forest

Posted 27 October 2012 - 12:58 AM

http://ceramicartsda...re-and-methods/

I like the super duper recipe-used it for decades
1/2 alumina hydrate
1/4 calcined epk
1/4 epk

I fire to cone 11 on advancers -this may be more than you need.The calcined (bisque keeps the cracking down)
You could make it with less alumina at cone 6.
Mark
Mark Cortright
www.liscomhillpottery.com

#5 justanassembler

justanassembler

  • Members
  • PipPipPip
  • 248 posts
  • LocationBaton Rouge, LA

Posted 27 October 2012 - 01:19 AM

If you dont have calcined kaolin, just throw a bunch of epk in a bowl and bisque it--preso-chango, calcined epk

#6 Marcia Selsor

Marcia Selsor

    Professor Emerita, Montana State University-Billings

  • Members
  • PipPipPip
  • 3,888 posts
  • Locationwhere Texas, Matamoros, Rio Grande and Gulf of Mexico come together.

Posted 27 October 2012 - 06:31 AM

yes calcining just means you have eliminated the chemical water. A very low bisque temperature is more than adequate.
I calcine several chemicals for glazes as well like calcined zinc, epk, etc.
I use a simple silica 40, kaolin 40 and Alumina 10.
Marcia

#7 neilestrick

neilestrick

    Neil Estrick

  • Members
  • PipPipPip
  • 2,593 posts
  • LocationGrayslake, IL

Posted 27 October 2012 - 12:55 PM

By calcining the kaolin it reduces it's shrinkage and the wash is less likely to flake off.

The less alumina you use, the cheaper it will be. I've been using:

1 EPK
1 Calcined EPK
1 Alumina
2 Silica
By volume (scoops)
Neil Estrick
Kiln Repair Tech
L&L Distributor
Owner, Neil Estrick Gallery, LLC
www.neilestrickgallery.com

neil@neilestrickgallery.com

#8 oldlady

oldlady

    single firing an electric kiln to cone 6

  • Members
  • PipPipPip
  • 887 posts
  • Locationharpers ferry west va and pinellas park fl

Posted 29 October 2012 - 01:24 PM

thank you all. enjoyed reading all your answers.

kiln wash is something we seem to take for granted. the britt article was very informative. looks like getting some calcined epk is important. as soon as i install the 6 new elements, today seems to be the perfect day to do that. i am in the middle of that area which is affected by hurricane sandy. there is rain dripping into the 3 buckets i put inside the fireplace. the rain is constant but no significant wind yet. power is still on so i can put a big lamp out in the kiln room to see what i am doing. hope all of you are not in danger and make it through this storm.

once all this is over and things are back to normal, i guess that the first thing i fire will be a bowl of epk. oh, wait. i hardly ever bisque. when i do, it is to cone 04. that should work.
"putting you down does not raise me up."

#9 ShellHawk

ShellHawk

    Member

  • Members
  • PipPip
  • 14 posts
  • LocationFolsom, Ca

Posted 27 December 2013 - 01:31 PM

Thanks for sharing all these recipes!

I have a vague memory of reading an article in CM where someone had developed a smooth, almost glass-like recipe for kiln wash. Does anyone know which one I'm talking about? It doesn't seem to come up in the search for articles and I could swear I read it in 2013...



#10 Mark C.

Mark C.

    Advanced Member

  • Members
  • PipPipPip
  • 2,808 posts
  • LocationNear Arcata Ca-redwood rain forest

Posted 27 December 2013 - 01:42 PM

Yes there was an article in recent years about that-self leveling wash-

No idea what month.

but I googled it for you

its here-

http://jeffcampana.c...ling-kiln-wash/

Mark


Mark Cortright
www.liscomhillpottery.com

#11 Mark C.

Mark C.

    Advanced Member

  • Members
  • PipPipPip
  • 2,808 posts
  • LocationNear Arcata Ca-redwood rain forest

Posted 28 December 2013 - 02:20 AM

Norm said

(Silica makes a great glass when glaze flows onto it, which creates a chipping project for a hammer and a chisel.)

I totally agree and long ago took the silica out of my wash recipe. I spend the extra $ on more alumina-

its cheaper in 50# bags.

We tend to use a bit in the salt kiln as well.

Mark


Mark Cortright
www.liscomhillpottery.com

#12 ShellHawk

ShellHawk

    Member

  • Members
  • PipPip
  • 14 posts
  • LocationFolsom, Ca

Posted 28 December 2013 - 02:34 PM

Mark, you're a rock star! I couldn't remember the name of the article. (I call it middle-aged hormone-brain! LOL!)

 

Since I'll be getting new kiln shelves soon, and my store-bought kiln wash is flaking all over the darn place, I figure it's high time I make my own!



#13 Chilly

Chilly

    Advanced Member

  • Members
  • PipPipPip
  • 211 posts
  • LocationLangdon Hills, Essex, UK

Posted 29 December 2013 - 08:32 PM

Anyone know a replacement for Darvan available in the UK?


----------------------------------------------------------

Ann

http://www.readypeda...uk/pottery.html


#14 Chilly

Chilly

    Advanced Member

  • Members
  • PipPipPip
  • 211 posts
  • LocationLangdon Hills, Essex, UK

Posted 30 December 2013 - 07:44 AM

Thanks Norm, I'd tried Googling for alternatives, but hadn't come up with a definitive answer.

 

Another item added to my shopping spending list :( !


----------------------------------------------------------

Ann

http://www.readypeda...uk/pottery.html


#15 Mart

Mart

    Advanced Member

  • Members
  • PipPipPip
  • 282 posts

Posted 31 December 2013 - 12:39 PM

Kiln wash, that stays almost powder like (more like packed powder) and requires minimal or no "grinding" is you friend. If your KW gets hard and you need grinder to remove it, it's obviously wrong mix for your firing temperature. Aluminium oxide is your friend too.

#16 Marcia Selsor

Marcia Selsor

    Professor Emerita, Montana State University-Billings

  • Members
  • PipPipPip
  • 3,888 posts
  • Locationwhere Texas, Matamoros, Rio Grande and Gulf of Mexico come together.

Posted 01 January 2014 - 02:01 PM

By calcining the kaolin it reduces it's shrinkage and the wash is less likely to flake off.

The less alumina you use, the cheaper it will be. I've been using:

1 EPK
1 Calcined EPK
1 Alumina
2 Silica
By volume (scoops)



Neil, our recipe looks very similar. Mine is also by volume.
Marcia

#17 neilestrick

neilestrick

    Neil Estrick

  • Members
  • PipPipPip
  • 2,593 posts
  • LocationGrayslake, IL

Posted 02 January 2014 - 01:50 PM

 

By calcining the kaolin it reduces it's shrinkage and the wash is less likely to flake off.

The less alumina you use, the cheaper it will be. I've been using:

1 EPK
1 Calcined EPK
1 Alumina
2 Silica
By volume (scoops)



Neil, our recipe looks very similar. Mine is also by volume.
Marcia

 

 

Lately I've also been adding gum solution to the mix to make it brush on easier. Mix 2 tablespoons of CMC Gum to 1 gallon of water, let it sit overnight, and mix really well (blender helps). Then use it for 1/3 to 1/2 of the water in wash.


Neil Estrick
Kiln Repair Tech
L&L Distributor
Owner, Neil Estrick Gallery, LLC
www.neilestrickgallery.com

neil@neilestrickgallery.com

#18 neilestrick

neilestrick

    Neil Estrick

  • Members
  • PipPipPip
  • 2,593 posts
  • LocationGrayslake, IL

Posted 02 January 2014 - 01:53 PM

 

Silica makes a great glass when glaze flows onto it, which creates a chipping project for a hammer and a chisel.

 

 

 

 

 

Yes, but it's such a stiff glass that it pops right off very cleanly with a chisel. No grinding needed, because the runny glaze never makes it into the shelf. And it's way cheaper than Alumina.


Neil Estrick
Kiln Repair Tech
L&L Distributor
Owner, Neil Estrick Gallery, LLC
www.neilestrickgallery.com

neil@neilestrickgallery.com

#19 neilestrick

neilestrick

    Neil Estrick

  • Members
  • PipPipPip
  • 2,593 posts
  • LocationGrayslake, IL

Posted 03 January 2014 - 02:01 PM

 

If you leave the silica out of your kiln wash you  can simply lift a runny glaze off a shelf.  It normally comes off still attached to the runny ware. Like a vase with tentacles. The rest slides off with one swipe of a spatula.  We don't hammer, grind or chisel and oddly I don't  miss that experience at all.

 

I can appreciate that you've likely invested a lot of time and effort into developing your hammering and chiselling skills.

 

Alumina Hydrate costs almost $2 a pound!  But we're extravagant, so we just throw caution to the wind and use about $4 a year on Alumina Hydrate for our kiln wash.  I suppose not everyone can afford that extra $2.50 a year.  But on the other hand you face a heavy front-end cost of the hammer and chisel, along with periodic sharpening - let alone your professional grinding equipment to resurface your shelves.

 

Instead of spending an extra $2.50 a year on Alumina Hydrate, you could spend several hundred Dollars on Advancer shelves and come away feeling especially clever.

 

You're emotionally invested in using silica in kiln wash. I get that. Believe me I've learned how tradition-bound potters can be - but change can be good.  As an experiment you should try Jeff Campana's self-leveling kiln wash and see what you think of it. You could buy a block of marble and put your chiseling skills to a more artful purpose.

 

Silica makes a great glass when glaze flows onto it, which creates a chipping project for a hammer and a chisel.

 

Yes, but it's such a stiff glass that it pops right off very cleanly with a chisel. No grinding needed, because the runny glaze never makes it into the shelf. And it's way cheaper than Alumina.

 

 

No emotional investment whatsoever. I just don't want to spend money where I don't need to. Using a primarily alumina recipe, a pound of alumina wouldn't get me through half of one batch of my shelves. I've got seventeen 14x28's to coat for my big kiln. It takes about 5 seconds to chisel a pot off, and another 5 to replace the wash. It's really not a difficult thing.


Neil Estrick
Kiln Repair Tech
L&L Distributor
Owner, Neil Estrick Gallery, LLC
www.neilestrickgallery.com

neil@neilestrickgallery.com




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users