Flooring porcelain ceramic tiles have got different grades regarding their quality. Various factors make these differences, for example, the raw material which is used in the ceramic tiles and the process of production, as well as the procedure of rectifying the tiles. The higher the grades of tiles and ceramic the more elegant the environment of the buildings would be. Although most of the customers are eager to buy the grade a ceramic tiles products the other grades have their usages too, the lower grades are mostly used in the warehouses or the parts of the building which are not in viewpoint. 
Note that, the quality of grades 4 or 5 is not constant in all purchases, they may vary in each bargain but Concerning the lower price of the grades b, c, or even d, they have their special market audiences too.
Porcelain Tile Quality
Producing porcelain tiles is the most recent technology in manufacturing ceramic tiles products. The quality of this product is remarkably different from ordinary ceramic tiles. So the demand for this kind of ceramic is higher. Porcelain tiles can be used inside, outside, and on the facades. Due to the high resistance of this kind of tile to the moisture and ultraviolet light and heat, the customers are confident enough to use them on any surface. 
Due to the low water absorption, porcelain tiles have lower staining, so they can be easily cleaned. Another quality factor of porcelain tiles is that they are produced in a way that cannot be inflamed in case of fire and it can limit the expansion of the fire on the surface. The other advantage of using the porcelain tiles in the building is the long lifespan, in case of accurate consumption pattern, these tiles can be easily used for more than 2 decades. Due to the all reasons which were mentioned above, purchasing porcelain products is more economical and reasonable for the customers.
Porcelain Tiles vs Ceramic Tiles
There is a significant difference between porcelain tiles vs ceramic tiles. Porcelain products are the most novel technology in manufacturing tile and ceramic products. Their water absorption rate is less than %0/05 so they can be considered the most compressed product to cover the walls and floors. The low percentage of water absorption of these groups of tiles is because of their high vitrified surface. The porosity of porcelain tiles is less than that of normal ceramic tiles and therefore the quality is higher. Regarding the process of production of these tiles and the high-quality raw material which is used in manufacturing them, the price is also higher than the ordinary ceramic tiles. 
Porcelain tiles are used in the region which is more probable of climate fluctuations or the humid regions. Due to the low rate of water absorption, they are also used in coating the floor and walls of the bathrooms and swimming pools. Concerning the low price of the non-porcelain tiles, customers usually purchase them to use in the dry regions and inside of the building. The design of both, porcelain tiles and ceramic tiles are acceptable but the porcelains concerning their production process and the raw material have more pleasant patterns.
Disadvantages of Ceramic Tiles
Though there is not a significant difference in the design of the porcelain and non-porcelain tiles there are some disadvantages about the non-porcelain tiles. Regarding the low density of the non-porcelain tiles in comparison to the porcelain ones, they are not appropriate enough to be used in the spaces which are exposed to extreme heat or cold therefore they are not proper enough to be used in the yards, balconies, or facades. 
Non-porcelain tiles are not suitable to be used in spaces with heavy traffic regarding the low resistance against breaking and tensile density. In comparison to porcelain tiles, non-porcelain tiles are not strong enough against scratches. Concerning the disadvantages of non-porcelain tiles, it's more cost-effective to purchase porcelain tiles for spaces with higher moisture or heavier traffics therefore there is less probability of damage in prolonged usage.
Tile Quality Grades
There is a numeric system of quality grades of the ceramic tiles from 1 to 5, on which the ranking is based on the thickness and qualification of the product. Grade 1 has the best quality and the product is almost without any defects, grade 2 shows that there are some trivial defects regarding the production process or the cutting. 
In lower grades, the quality is also lower than the grades 1 or 2. Water absorption is an important factor in grading the tiles. As the absorption rate is lower the grade of that ceramic tile is higher. One of the serious concerns about the floor tiles is the slip resistance rating, the more resistance against slip, the higher grade of tiles will be.
How to Check the Quality of Tiles
The manufacturers of tiles and ceramics are usually concerned about how to check the quality of tiles. The process of grading the tiles are mostly done in the factories and some case, the tiles will be submitted to the laboratories for accurate grading. Note that, the dimension, thickness, and resistance of the tiles will affect the grading. 
Tiles grading clarifies the quality and deficiency scale of the products. Regarding the points which were mentioned above, the grading of the ceramic tiles is the first factor that the customers pay attention to, and even though most people suppose that only grade 1 is qualified enough for export, grade 2 is of perfect qualification and many customers require grade 2 ceramic tiles due to its reasonable price. Our manufacturers have the potential to supply all grades according to the demands of our customers. We are honored to provide the best quality tile and ceramic products with exact grading and reasonable prices.