The Particles Inside The Marble Are Loose And The Quality Is Poor

Put a drop of ink on the back of the marble. If the ink quickly disperses and leaches everywhere, it means that the particles inside the marble are loose and the quality is poor; but if the ink drops do not penetrate, the marble is dense and the quality is good.

This is actually a simple test of the water absorption rate of the marble. If the ink droplets do not penetrate, it may indicate that the texture of the marble is relatively dense and the water absorption rate is low. Marble is generally coated with a protective agent to prevent stains from penetrating. Even if the customer sees that the ink droplets are not penetrating, it is likely that the protective agent is working, not the performance of the marble itself. In addition, if the water on the back of the marble becomes bead-like, it means that it is difficult to absorb water after the protective agent is applied to the marble, and it may not be able to adhere to the cement. Therefore, it can be considered that the lower the water absorption on the front of the marble, the better, but it is also It should be considered whether the back of the marble can bond well with the cement-based adhesive.