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Rex Johnson

Member Since 27 Jul 2010
Offline Last Active May 17 2017 12:23 PM

Posts I've Made

In Topic: New Kiln Burners

02 May 2017 - 09:36 AM

I'm terrible at this math stuff...according to the Ward link my 2' x 3' x 4' downdraft requires...?...I'm never sure.

That said, my kiln is only 4 1/2" softbrick thick with a 1/2" outer layer of fiber blanket sandwiched within sheet steel and a 7" softbrick flat roof and about a 12' chimney.


I have two squirrel cage blowers on with 2" Sticktite burner tips on about 12" length pipes with the appropriate propane sized orifices.

My propane tank is a 250 gallon that has 1" gas pipe running about 22' away from the valves.


It takes a lot of adjusting and monitoring to get this puppy to cone 10 which is why I decided to go with cone 6-7 clay and glazes last year.


Per Ward's formula 2' x 3' x 4' x 30,000 BTUs/cu. ft. = 720,000?


At any rate, I can do a strong cone 7 firing, fairly even in 8-10 hours.



In Topic: Show Me Your Handy Dandy Spray Booth

02 May 2017 - 09:08 AM

...agree with that. Expensive equipment out there if you want something that's large enough and actually pulls enough air.

Cheapest I've seen is $450 for a used unit. I'd like to just contain the overspray a bit. Since I work outside anyway it's not really an issue but it makes for alot more cleanup.

I do some large platters that require some space around the piece as well.

Anyhow, thanks for the input all.

In Topic: Show Me Your Handy Dandy Spray Booth

24 April 2017 - 04:08 PM


Plastic trash can spray booth. Mine is 1 year old.





Like! I reckon I could use my squirrel fan up top for even more pull.

In Topic: How Do You Mark/sign Your Work?

20 March 2017 - 03:25 PM

...sig stamp plus cone and/or clay body for my reference...



In Topic: Clay For Making Kiln Furniture

06 February 2017 - 01:07 PM

Laguna also makes a Refractory Body clay.

I've used this for saggars successfully. It is a little rough on the hands, but it's designed as a refractory clay.


Refractory Clay Body   certified-nontoxic.gif  

Low expansion, semi-coarse high temperature body for refractory use. Best refractory quality when fired at Cone 13.