Oh,,, what a beautiful natural glaze.
It’s shining gold!
The method is almost the same as that of “Hidasuki”.
The iron in the clay and alkali in the rice straw create a chemical reaction inside the kiln resulting in the red color. Thanks to this chemical reaction, traces of the rice straw create a pattern, resembling the flames.
But Blue Bizen is made by reduction firing.
The only difference between red (Hidasuki) and blue is the oxygen concentration during the firing. It is very difficult to control all of the elements needed to create “blue Bizen”, so this color is very rare and prized by connoisseurs.