Natural decorative stone is made of natural stone, so its quality is determined by the quality of waste materials on the one hand, but also related to the processing process. Poor quality marble and granite slabs are mainly manifested in the following aspects:
1) The pattern tone of the surface is not beautiful
High-quality stone surface pattern color beautiful and generous, elegant, so that the decorative surface has a strong decorative effect. And the quality of stone after processing surface pattern color is not beautiful, can not give people the enjoyment of beauty. Therefore, the pattern tone of stone surface is the main index to evaluate the quality of stone.
2) After processing the appearance of the plate quality is better
Stone in the processing process will leave some defects in the surface appearance, if these appearance defects beyond the scope of national standards, stone is not qualified. With these poor appearance of poor quality stone decoration, its overall effect will be very poor, so, in determining the quality of stone, in addition to considering the color of the pattern, but also to check the appearance of the quality.
3) The deviation of specification size is large
Decorative stone is processed into sheet metal for use, construction using collage or collage method. If the specification size of the deviation of large plate placement, the surface will be uneven, uneven seams, especially for façade decoration, will make the decorative surface of the line is not neat, affecting the overall decorative effect. Therefore, the deviation of specification size will also directly affect the decorative effect of stone.
4) Poor physical and chemical performance indicators
Poor quality stone pressure strength, fold strength, wear resistance, durability, hardness and other performance are poor, can not guarantee the use of stone durability.
