Among many marbles, white marble is undoubtedly one of the most widely used stones. It is not only used in high-grade and luxurious wall, floor, and table panel projects, but also played with white marble, such as clothes, light bulbs, fruit trays, loudspeakers, and even toilets.
But at the same time, it is also the most loving and frightening variety, because the affectation, vulnerability, and difficult service of white marble in anti-pollution make some users feel very difficult, especially the fact that white marble is easy to turn yellow makes many users who love white marble respect and stay away from it.
To solve the problem of the yellowness of white marble, we must first investigate the reasons for the yellowness of stone materials. What is the reason why white marble is yellow? Let’s talk about these problems in this article.
● Internal reason: stone structure and compositions.
1. The oxidation of iron minerals contained in white marble is considered to be the main cause of marble yellowing. Except for the grain part, the design and color of other parts of most marble are relatively single and uniform. When the iron-containing minerals randomly dispersed in marble are oxidized to form yellow or brown hydrated iron oxide, the defects and aesthetic stains on the board surface are formed. This phenomenon is particularly prominent for white marble.
2. The iron in white marble mainly exists in ferrous sulfide, ferric carbonate, and magnesium iron silicate. These iron minerals are dispersed in the marble matrix or enriched in the lines of marble. When these divalent iron ore substances on the stone surface are oxidized into trivalent iron by oxygen in the air and combine with water to form the hydrated iron hydroxide, we often say rust, commonly known as yellow spitting. If no protective measures are taken, this phenomenon of marble spitting yellow will occur 8-12 months after marble placement.
3. The second kind of yellowing pollution on the surface of white marble comes from the organic matter inside the marble, which exists in the formation process of marble, and its structure is similar to rotten plants. These water-soluble organics in marble often show brownish yellow when they react with alkaline water.
● External causes
The above two kinds of pollution of white marble come from the internal composition and structure of stone, which occurs under the influence of external conditions. In addition to these two types of pollution related to stone composition and structure, external pollution also includes the following aspects:
(1) Yellowing due to wear
With the wear of the polished marble surface, pollutants are brought into the fine holes on the marble surface along with walking. These pollutants make the white marble surface yellow.
(2) Yellowing caused by improper care
Clean the white with a dirty wet mop and other cleaning tools. The pollutants brought by the dirty mop accumulate in the marble, making the marble surface yellow.
(3) Yellowing caused by waxing
When polishing the marble surface with wax, the thick wax layer turns yellow due to its aging.
(4) Yellowing caused by crystal surface treatment
The steel wool used for crystal surface treatment, with tiny fine powder remaining in the micropores on the polished marble plate, has become the root of yellowing, especially when the marble is treated in a wet state, yellowing is easy to occur.
(5) Yellowing caused by installation
The yellowing of stone related to installation is mainly caused by two aspects: one is that the original waterproof treatment of one side is damaged due to the need for installation size and on-site cutting; Another possibility is that the construction environment is dirty and messy. When wiping the dirt with a wet towel, it is very likely to wipe the strongly alkaline cement water into some dark cracks on the board surface, resulting in pollution and yellowing.
● Prevention of yellowing of white marble
1. The yellowing caused by the internal composition and structure of marble occurs through external conditions. This external condition is oxygen in water and air. Therefore, as long as the water is effectively prevented from passing through the stone, the yellowing caused by stone components and structure will be effectively restrained. At present, the more efficient and commonly used method is stone waterproof back glue.
2. For the yellow-white marble caused by external reasons, it can be prevented by reasonable use and maintenance. The mop used for cleaning the floor shall be kept clean, the water used for the floor must be clean, after the floor is finished, the water on the ground shall be wiped clean, and the dry wipe shall be used as far as possible to avoid wet dragging. If possible, it is best to use a marble cleaning solution for maintenance. When the stone has no luster, try not to wax, but use crystal surface treatment, but it must be completed by a regular company.
3. The practitioners of stone installation must have a certain professional foundation, understand the reasons for the yellowness of stone, have the necessary skills for installing stone, keep the construction environment clean and tidy, and avoid the yellow stone caused by installation. Take care of the stone scientifically and avoid introducing iron that will make the stone yellow from the cleaning water or floor polishing process. Use a high-quality permeable waterproof agent to regularly protect the floor and reduce the time and opportunity of contact between water and stone.
● Removal of yellowing of stone slab
Once the yellowing phenomenon of white marble board is found, the reason for yellowing should be found out first. Before turning the suspicion of yellowing to rust, first determine that yellowing is not caused by aging wax or other external factors. After excluding factors other than iron, start to prepare for rust removal. Please remember to invite professional stone care companies. They generally use weak acid or even neutral cleaning agents, which can reduce the damage to stones. Because the stone plate surface rust removal is a professional work, it is not recommended that non-professional owners of non-professional nursing personnel purchase unknown rust remover without authorization to remove the yellow spots or rust spots of the stone, to avoid permanent damage to the stone.
Decontamination of white stone is very professional work. Professionals must be invited to operate it. In addition, standardized and reasonable maintenance should be carried out when using it at ordinary times. Well, this article is written here. You are welcome to email me at sales@sntstone.com, let’s discuss more good methods of white stone maintenance.
