A naked furnace frame wouldn’t run very efficiently, so time for some fluffy 2600F-rated spun alumina (industrial sapphire) blanket.
![We used a scrap of copper for a form and added a 1" layer of blanket around it.](http://glassprinted.com/wp-content/uploads/2015/10/XB7A1880.jpg)
![Looking nice and cozy already with more insulation to come!](http://glassprinted.com/wp-content/uploads/2015/10/XB7A1879.jpg)
![A soft floppy blanket won't do as a frame to hold our SiC elements (coming soon) so we soaked the alumina blanket in colloidal silica to rigidize it (once it is dry)](http://glassprinted.com/wp-content/uploads/2015/10/XB7A1889.jpg)
![We made sure the blanket was soaked good. The orange tape was a temporary form to keep the blanket from sagging under its wet weight.](http://glassprinted.com/wp-content/uploads/2015/10/XB7A1891.jpg)
![After not long it was stiff enough to remove the tape, though still quite colloidal-logged.](http://glassprinted.com/wp-content/uploads/2015/10/XB7A1896.jpg)
![Wrapped up! Still wet with colloidal silica but she is really starting to look like a toasty furnace. We'll probably add one one layer of blanket - its quite light and would add considerable more efficiency.](http://glassprinted.com/wp-content/uploads/2015/10/XB7A1908.jpg)
A naked furnace frame wouldn’t run very efficiently, so time for some fluffy 2600F-rated spun alumina (industrial sapphire) blanket.
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