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Black absorber coating or paint to absorb heat

I need your help. Not some expensive process. But some type of thing that everyone will be able to copy. I am making a Solar Cooker for food cooking. I need your help as to what is the best "Absorber Material" OR Paint that I can coat the surface with to absorb "more" solar gain. I need your advice, I am building a cheap cooker of cardboard, wood, aluminum. Please respond as soon as possible.

Thanks, it will help.

Leland Freeborn
Kingdom of God - Parowan, Utah, USA
2002

Hey you might want to use salt rocks, they work great and are inexpensive, if not try to use copper to absorb some heat.

Andrew Donso
- Miami, FL, US
2004

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