How to make

�@Choose a carton as shown in the picture whose depth is larger than its height, and the height is larger than the width.



If you choose the box with the depth of around 40cm, you can boil 500cc of water in 90min in summer in Japan.




Remove four flips on the top. We use them later.




Let's name the longer flip A, and the other, B.




Cut along the red line in the picture




Then you will get a cross-shaped development. When it comes apart, put them together with bond.




Cut along the red lines. Then, add parts A and B as shown with bond.




Adhere aluminum foils on the surface of the body. Do not mind wrinkles. They will not affect the performance of the cooker at all. You can use ordinary paper paste to stick the aluminum foils.




Leave it one night to make the paste dry completely. To set up the cooker, use clips. At first, with two clips, put together the rear panel (with A parts) and side panels. Make sure that the side panels are inclined around 60 degrees from the horizontal plane (ground) and the rear panel is upright.




Then fold the front panel at the line shown in the picture. We use a part of the bottom as the extention of the front panel. It increases the power a lot so make sure that you raise the front panel at that position.




This is the view from the side.




This is how it looks from its front.




According to the sun elevation, adjust the angle of the front panel for the pot to receive the maxmum amount of sun light. For example, when the sun is high (say around 70 degrees), set the front panel at around 45 degrees.




Select the black colored pot and put it in the plastic bag which is heat resistant (Polypropylene) to reduce the heat loss by convection. (Or you can make your own green house using a glass bowl, clear plastic case, etc.)




Place two sticks between the pot and the cooker to reduce the heat loss by conduction.




After setting the pot in the cooker, direct it to the sun and wait around 90 minutes.




You can bake a cake as shown in the TV program.