Why is the tube colored blue?

The GoSun's solar vacuum tube is internally coated with a microscopic layer of aluminum nitride, a powerful semiconductor. This material has the unique ability to absorb a broad spectrum of electromagnetic radiation, including ultraviolet light, which can pass through clouds when visible light can not, allowing the stove to cook a meal in less than ideal conditions.

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    Margaret Adams

    In looking this up I found that when heated it is extremely toxic...wondering why you are using it...

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    James Wolf

    Hi Margaret, good question. The only material which comes in contact with food is the borosilicate glass. The cooking chamber is a vacuum tube; two layers of glass with a pocket of air between them. Hope this helps!

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    James Wolf

    Also the tray is made of stainless steel, and the stopper/plug near the tray handle is a food grade silicone

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    Margaret Adams

    Thanks for that information...sounds very non toxic. When I looked up what the blue in the tube is it said it is aluminum nitrile which when heated give off very toxic gasses.

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    Colin Kaminski

    The dig ran shows the nitril layer in between the two glass layers in the vacuum part of the tube. Making no chance for toxic gasses to escape.

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    Colin Kaminski

    ^diagram

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