Original Extra-Crispy: 1,800 F to 1,500 F at 50 F per hour

Red Hold: 1,688 F hold for one hour, then cool to 1,500 F at 50 F per hour

Orange wider faster-cool: 1,900 F to 1,500 F slow-cool at 50 F per hour

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Albums: Glaze

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Comment by Norm Stuart on August 23, 2017 at 11:33am

I prefer Randy McCall's Warm Jade, which he adjusted from Floating Blue.  The Tin gives it a glow.

But the studio didn't have any mixed up when I did the recent slow-cool tests.

.

500   Randy McCalll's Warm Jade  ^6
44.2%   Nepheline Syenite
25.2%   Gerstley Borate
18.9%   Silica
11.7%   Ball Clay OM4
5.0%   Tin Oxide
4.0%   Rutile
3.0%   Copper Carbonate
Comment by Norm Stuart on August 23, 2017 at 11:22am

These are some other photos of Xavier's Warm Jade at different cooling schedules. The one hour hold at 1,688 brought out some unattractive crystallization.  You can see glaze thickness changes the look as well. The titanium in the rutile is a likely source of some of the crystallization.

Comment by Joseph Fireborn on August 23, 2017 at 11:01am

Interesting. I am guessing the rutile is causing the orange/brown breaks 

Comment by Norm Stuart on August 23, 2017 at 10:59am
110.0%   Xavier's Warm Jade Green  ^5
40.0%   Feldspar Custer
16.0%   Whiting
16.0%   Silica 325
10.0%   Kaolin
9.0%   Talc
9.0%   Ferro Frit 3124
4.0%   Copper Carbonate
6.0%   Rutile  try 3%
Comment by Joseph Fireborn on August 23, 2017 at 9:32am

I am curious does the warm jade have spodumene in it? 

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