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Use clear lake, pond ice or try boiling water for 3 minutes let the water cool; then boil for 3 minutes again and let cool to remove gas. Create a foil container 2" deep and freeze slowly. Or buy a clear block of ice. To make fire, the ice must be clear.
Look at the bottom of http://primitiveways.com/fire_from_ice.html to see a Big ice lens.
Look at the bottom of http://primitiveways.com/fire_from_ice.html to see a Big ice lens.
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Signing UpStep 1Shape the ice lens for fire making.
Shape the ice lens for fire making. First shave with a knife to get the rough shape of a lens. You can also grind your ice fire lens on cement or a stone.
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u copier this is from another site
btw nice instructable
There's a few things on Instructables that tell you how to make clear ice (the comments expand on these, too), such as make crystal clear ice and The Ice Bulb.
But generally the clearer you make your ice and more uniform the surfaces are, the better the light concentration will be.