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jrgpots

Member Since 15 Mar 2013
Offline Last Active Yesterday, 11:48 PM
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Topics I've Started

Stacking Help For Reduction Gas Firing

15 September 2014 - 03:15 PM

I am looking for literature on how stack gas kilns for even reduction firing. I need education about how to use bag walls and stacking to direct the flame through a kiln.

Jed

Learning Reduction In My Conversion Kiln

13 September 2014 - 01:00 AM

I unloaded my kiln conversion kiln this AM. I still have lot to learn, but I wanted to show off a little.

This is my first piece using my homemade O2 sensor to control reduction.

What do you think?

Jed

Oxymeter Reading During Reduction

11 September 2014 - 02:52 PM

I am 3 hours into firing my small gas conversion. My homemade oxymeter is reading 27.1 mvolts. The damper is open 1 inch and there is the smell of reduction in the air. There is an orange glow in the kiln.

What range of readings (in mvolts) represents light,medium, or heavy reduction?

Jed

Well Taken Care Of Alpinehf24 Updraft

02 September 2014 - 07:38 PM

There is an Alpine HF24 updraft gas kiln with controller for sale not too far from my area.  The serial Number is 95115,  I think it may mean that it was built in 1995. It is IFB 2800 with power burners.  There is no fiber blanket material.  Wals are 7-8 in thick.  see pics.  The furniture is not included.

 

What would be a good price on this model KIln?

 

 

Jed


Are Zinc/tin Oxides Active At Cone 6?

28 July 2014 - 08:06 PM

I found a nice recipe for a cone 6 chun red in reduction and pale green in oxidation.

Custer feldspar,..............428
Silica........................153
Whiting.......................133
Frit 3124.....................122
EPK.................. .........51
Zinc ox........................41
Talc,..........................31
Tin ox.........................21
Bentonite......................10
Copper carb....................10

I know zinc oxide is a great opacifier at low temp and pretty much sublimated at high temp, cone 10.

So here is my question. At cone 6 how much of the zinc is still around to influence the glaze? And, if it has minimal influence, do I need to use it?