Due to a three-dimensional amorphous structure of the short-range order instead of the long-range order in the separative-phase glaze, it was the main source of the structural color. The structural color of the object was caused by optical effects developed by microstructure such as interference, diffraction and reflection when the size range of the object was comparable to the optical wavelength range [22,23]. The developing color strongly depended on the refractive index and the size of periodic structure [23]. Its color rending principle could be analyzed by the Rayleigh scattering. When the size of scattering particles was 1–300 nm, the Rayleigh scattering might occur in glaze. The scattering intensity was determined with the following formulas [15,24].