| Classification of Defects | Standard |
|---|---|
| Chippings, Cracks or Part Off | No defects shall be observed. |
| Distortion or warpage | No Harmful defects to use shall be observed |
| Unevenness except for decorative purpose, dents, stains, flaws or mixing of foreign matters | Defects shall not be remarkably observed when visually checked at the position of 60CM apart |
| Irregular patterns, gloss and color tone except for decorative purpose | Defects shall not be remarkably observed when visually checked at the position of 2M apart |