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jrgpots

Member Since 15 Mar 2013
Offline Last Active Nov 19 2014 11:58 PM
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Topics I've Started

Piping Ideas

16 November 2014 - 04:54 PM

I have porcelain #5 cone 6. I want to thin this and try piping it like royal icing on my gingerbread church (26" long X 22" wide X 24" tall if I count the steeple). Do I just make very thick slip. I have thought about thinning the clay with magic water.

Will this work? If not...please help.

Jed

Stain Ct1807, What % Do I Add To Porcelin 5 To Make Red Clay?

08 November 2014 - 02:05 AM

I will be making non-funtional candy canes to decorate ceramic gingerbread church.....no dinnerware. I have white porcelin 5 and stain CT1807 red. How much stain do I add to the clay for a strong red color? Since it has Cd, I will be using a respirator and gloves.

Jed

Hard Brick Vs Ifb

25 October 2014 - 05:05 PM

I have found a supply of supper duty hard brick which are 9x6x3 for $0.50 each. I was told they are stable up to 8,000 degree F. So how long would a 12-14 cubic ft made of these hard bricks take to fire and cooldown without IFB lining? How much more gas would it take to fire?

If I put IFB liner, should it be 2 1/2 or 4 1/2 inches thick?

If I use kaowool for the liner, should I use 1 or 2 inches?

Or sould I not bother with the hard brick?

Jed

Icing For Ceramic Gingerbread

05 October 2014 - 03:18 PM

I am planning the make gingerbread houses from Laguna electric brown cone 6 clay body. I want to use a white slip for the icing. The slip needs to be thicker than normal,,,,I think.

Any suggestions?

Jed

Adding Refractory Insulation To Outside Of 2.5 Inch Kiln Wall

25 September 2014 - 12:18 AM

My gas conversion kiln has a 2.5 inch wall so I'm burning a lot of extra gas because of the thin walls. I want to make an outer insulating layer that would be 3-4 inch thick to improve firing, slow cooling by reducing heat loss.

I have fire clay and perlite. Do I need to add mullite or a calcium aluminate cement; or can I use a different type cement in my homemade castable?

I have read over and over again not to use portland cement because it spalls and and sometimes explodes. Is this still true for the outer insulating layer?

Kast-o-lyte costs $116 for 55lb bag mullite is slightly less.

Any suggestions?

Jed