The disadvantage is that the flint is heavy and inconvenient to carry, and cleaning has also become a difficult problem. The advantage is that it is firm and durable, has certain acid and alkali resistance, and can also resist high temperature, which is very environmentally friendly and healthy.

rock slab has the advantages of safety, sanitation, fire resistance, high temperature resistance, dirt resistance, scraping resistance, easy cleaning and impermeability. Disadvantages: it is brittle, and it will break when it vibrates.