Image display device and manufacturing method of the same

A method of manufacturing an image display device having a front-side glass substrate and a back-side glass substrate, the front-side glass substrate and the back-side glass substrate being manufactured by a float method, the front-side glass substrate and the back-side glass substrate each having a surface on which an Ag electrode is to be formed, the method comprising:

• measuring a reflectance of a surface of a glass substrate on which the Ag electrode is to be formed;
• and
• selecting whether the glass substrate is to be used as the front-side glass substrate or the back-side glass substrate based on the measured reflectance,
• wherein the measuring of the reflectance comprises measuring the reflectance at a wavelength maximizing a difference between a reflection spectrum at a wavelength of 200 nm˜250 nm on the surface of the glass substrate on which the Ag electrode is to be formed and a reflection spectrum at a wavelength of 200 nm˜250 nm at a part formed by removing no less than 15 μm˜20 μm from the surface, and wherein the selecting of the glass substrate comprises using the glass substrate as the back-side glass substrate when the measured reflectance exceeds 5%.