Glass having visual internal roughness and method for manufacturing same

A method for manufacturing a chemically tempered glass, comprising:

• preparing a slurry or paste containing a salt of a second ion to be ion-exchanged with a first ion inside a glass;
• applying the slurry or paste onto a surface of the glass to form a coating film;
• drying the coating film formed of the slurry or paste on the surface of the glass;
• differently forming a distribution of a precipitated phase of the salt of the second ion on the surface of the glass;
• and
• heat-treating the glass on which the coating film is formed to form a textured structure which is disposed between a first surface and a second surface facing each other on the glass to induce diffuse reflection and/or scattering of light traveling through the first surface or the second surface,
• wherein the textured structure is formed by controlling a diffusion of the second ion to be ion-exchanged with the first ion, and corresponds to a boundary between a diffusion region where the second ion is diffused and a non-diffusion region where the second ion is not diffused.