The diagram illustrates how a solar box oven cooks food. Overall, there are six steps which begin with painting the cardboard box black and end with placing the food inside the special box.
Turning to the details, the first step involves painting the box with black paint, which absorbs sunlight more effectively. This is followed by a special black receptacle filled with vegetables. The next step consists of closing the container and preparing to place it into the large box.
The special box contains insulating materials and a solar heating system designed for better heat retention. The newspaper, grass, or sawdust supports the transfer of heat, which results in a rise in temperature. After the container is put into the box with an additional glass lid on top, the temperature reaches approximately 85 degrees Celsius, and a small round opening is cut in the middle of the box for direct sunlight. This supports the cooking process through a simple but effective solar heating system.