Getting a good razor is still difficult in many Eastern European countries, so Drbal tried to patent and market his discovery. The patent office refused to consider it until the chief scientist had tried building a model himself and found that it worked. So the Cheops Pyramid Razor Blade Sharpener was registered in 1959 under the Czechoslovakian Republic Patent No. 91304, and a factory soon began to turn out miniature cardboard pyramids. Tody they make them out of styrofoam. The edge of a razor has a crystal structure.
Crystals are almost alive, in that they grow by reproducing themselves.
When a blade becomes blunted, some of the crystals on the edge, where they are only one layer thick, are rubbed off. Theoretically, there is no reason why they should not replace themselves in time. We know that sunlight has a field that points in all directions, but sunlight reflected from an object such as the moon is partly polarised, vibrating mostly in one direction. This could conceivably destroy the edge of a blade left under the moon, but it does not explain the reverse action of the pyramid. We can only guess that the Great Pyramid and its little imitators act as lenses that focus energy or as resonators that collect energy, which encourages crystal growth.