Electric Mid&Hi Fired Ceramics
Potters & Sculptors - Making Rock from Mud
Three Different Slow-Cool Schedules
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
Albums: Glaze
Comment
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Comment by Norm Stuart on August 23, 2017 at 11:33am
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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.
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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
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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.
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Comment by Joseph Fireborn on August 23, 2017 at 11:01am
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Interesting. I am guessing the rutile is causing the orange/brown breaks
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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%
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I am curious does the warm jade have spodumene in it?
Videos
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Tips for Members
If you just want to spout off, it is best accomplished as a blog posting. If you want to get more guidance and ideas from other members, ask a question as a new discussion topic. In the upper right corner of the lists for both types of posting, you will find an "+Add " button. Clicking it will open an editor where you create your posting. 4/16/2014
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