Quality of ceramics Grade A: If there is nothing eÎeding 24 kinds of defects on the product, the product is considered an eÎllent product. Quality of ceramics Grade B: It is classified between Grade A and Grade C . It can accept 2-4 defects from the listed defects mentioned abov What are the different grades of tile? How The Ceramic Tile Grading Scale Works ● Grade 1: These tiles are considered the softest and are more likely to scratch easier than the other grades. ... ● Grade 2: Similar to grade one tiles, our customers find grade two tiles work well for backsplashes and walls. ... ● Grade 3: ... ● Grade 4: ... ● Grade 5: How do I know what grade my tile is? The grade of porcelain tile is affected by the mixture of materials used in its manufacture, but mostly the grade is determined by the tile's thickness . Thin, grade 1 tiles are not necessarily lower in quality than higher grades, they just have different use What are the different grades of porcelain? Porcelain tile i