Jump to content


Photo

glazing at different temps


  • Please log in to reply
7 replies to this topic

#1 druttaro

druttaro

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 05 February 2013 - 12:20 PM

I am making a bowl and want to apply glaze at cone 10 only on the inner surface, then refire it at cone 5 with underglaze for vibrant colors. Is this even possible? Will the inner glaze be damaged? Any help is welcomed!

#2 Marcia Selsor

Marcia Selsor

    Professor Emerita, Montana State University-Billings

  • Members
  • PipPipPip
  • 3,675 posts
  • Locationwhere Texas, Matamoros, Rio Grande and Gulf of Mexico come together.

Posted 05 February 2013 - 01:46 PM

Yes it is possible but be careful that you don't shock the matured/vitrified clay on the second glaze firing. you may have a tricky time getting the ^5 glaze to stick after the ^10 firing but it is possible. You can get brighter colors at ^10 if you use encapsulated stains. That could save you the hassle of 2 glaze firings and struggling with glaze application on a vitrified body.



Marcia

#3 neilestrick

neilestrick

    Neil Estrick

  • Members
  • PipPipPip
  • 2,390 posts
  • LocationGrayslake, IL

Posted 05 February 2013 - 02:14 PM

There's also a decent chance that the cone 10 glaze will change in the cone 5 firing- color shift, glossiness change, etc. Test it first.
Neil Estrick
Kiln Repair Tech
L&L Distributor
Owner, Neil Estrick Gallery, LLC
www.neilestrickgallery.com

neil@neilestrickgallery.com

#4 druttaro

druttaro

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 05 February 2013 - 02:33 PM

Thanks for the replies.

I do have a test piece drying but wanted to see if it was even possible. I am not to concerned with color change to the ^10 glaze but don't want it to change texture.

I am doing sugar skulls so will be happiest with good color on the outside.

Attached Files



#5 bciskepottery

bciskepottery

    Advanced Member

  • Members
  • PipPipPip
  • 1,369 posts

Posted 05 February 2013 - 03:18 PM

Something to think about . . . why not use a cone 5/6 claybody, glaze fire to cone 6 and apply the underglazes for the same fire? I am assuming your underglazes are for the sprigs attached to the outside of the bowl. Save yourself time and the cost of the extra firing.



#6 Mark C.

Mark C.

    Advanced Member

  • Members
  • PipPipPip
  • 2,580 posts
  • LocationNear Arcata Ca-redwood rain forest

Posted 05 February 2013 - 04:25 PM

I am a cone guy-and most glazes will change somewhat when fired again to lower temp. That is a shiny glaze can become matt etc.
I am with Marcia on the cone 6 all the way body-
Testing is the only way to know any of this as you are in unchartered territory.
Mark
Mark Cortright
www.liscomhillpottery.com

#7 druttaro

druttaro

    Newbie

  • Members
  • Pip
  • 3 posts

Posted 06 February 2013 - 07:11 PM

I am taking a class at my university and have to use the clay available.

#8 Lucille Oka

Lucille Oka

    Advanced Member

  • Members
  • PipPipPip
  • 756 posts
  • LocationCalifornia

Posted 06 February 2013 - 09:57 PM

Why must you do this, are these the only glazes available to you?



John 3:16
"For God so loved the world that He gave His only begotten Son, that whosoever believeth in Him should not perish but have everlasting life".




0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users