I was hoping to use 2 x 2" rigid insulation for a total of 4" which would have given an R Factor of 20 but there wasn't enough room so we opted to use two layers instead 3.6" so 17.5 R factor.
via Deb V Designs http://ift.tt/2lKb315
Broom Casting Silver and more...
Adventures in Silver Broom Casting I invited a few girlfriends for lunch today and one of them suggested we do broom casting. Two of the ladies took a class recently and the other two (myself included) were intrigued by the concept and willing to give it a try. With a new crucible, the first step is to flux it. First lesson: "do not add borax (flux) until the crucible is very hot" or else it will fly everywhere. Makes sense, right - LOL I retreated to my bench to do the deed. Once I heated the crucible, I added a little borax (flux) to coat it. My first casting was using brass (copper for my second). It took forever to melt, even with the addition of an additional torch. There was more success with the brass casting vs. the copper (exact opposite of what I expected). Not sure if the type of fuel is important, but I used mapp gas which could have been part of the problem, along with a slight breeze. I ma...
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