If you are thinking about making your own Parabolic Mirror, (whether you are making a parabolic solar cooker or simply just ‘caz) here’s great set of videos you can refer to for some tips.
You can make a parabolic mirror from an old satellite TV dish, or a bathroom vanity mirror but that’s not fun. Making your own mirror allows you to get the exact curvature you need for whatever you might be burning, cooking or heating. It’s a fair amount of work, but the resulting energy the mirror produces is amazing.
via make
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