Recently, many friends have consulted a very similar marble rust yellow problem that is reversed from the bottom of the board. It seems that this rust yellow is not only common, but also difficult to clean. We will share it, if you encounter the same situation, you can also give everyone a reference.
First, the rust yellow originated from the bottom of the plate
This kind of rust yellow which is reversely osmosis from the bottom of the plate is generally light in color, and is not as heavy as the rust yellow color formed by the contact of the stone surface with iron. However, because this rust yellow pollution has penetrated the entire plate, it is more stubborn, and it is difficult to thoroughly clean it.
Reverse osmosis
Second, the cause
This problem is more common on light-colored marble slabs. Since it is rust yellow, the cause is necessarily related to iron. There are two main reasons for summing up:
1. Reinforced steel bars on the back of the stone
1 special processing technology
People familiar with the stone industry are familiar with a marble processing technology. This process is probably used between 2000 and 2010. It is this kind of process that causes the problem of rust yellow in the daily use of stone. Let's briefly introduce it.
We know that the hardness and bending strength of natural marble are relatively weak, not as hard as granite. However, in the domestic stone market, relatively thin plates are generally popular. Everyone thinks that marble has a decorative effect, and it doesn't matter if the board is cut thin. The most important, thin board is conducive to increasing profits.
However, due to natural or artificial factors, natural marble will inevitably have some cracks and cracks. The sheet is thinned and the strength is lowered, and problems such as breakage and breakage may occur during processing, handling, and installation. This situation must be avoided. As a result, many stone processing plants have used a "back slotting, adding steel" method to increase the strength of the board.
The specific method is: after the board is cut out, a surface is selected by mechanical opening before polishing and polishing. Then add 3~5mm diameter steel bars in the tank, then fill and fix with marble glue. We did not find the original image for this process, but it is basically similar to the one below. This kind of process has appeared more between 2000 and 2010, and it is relatively rare now.
How to judge whether it is caused by steel bars? It is also very simple: because this kind of rust yellow is generally linear along the steel bar, as long as this feature is found, it is generally OK.
Reinforcement
2 rust yellow cause
Marble sheets using this process will inevitably come into contact with water or moisture after installation, and are prone to rust yellow. Especially in the high temperature and high humidity environment in the south in the summer, even if there are marble glue wrapped, these steel bars will still rust and mottle.
If the board is not protected, or if the protection fails due to too long time, the rust will mix with the glue and one will penetrate upwards to form a yellow spot. This problem is even more pronounced if there are more cracks in the stone.
Therefore, stone protection is not a panacea, it also has certain limits and shelf life. This should attract everyone's attention.
2. Other iron sources
In addition to the special process reasons mentioned above, sometimes for some needs, the back of the stone will also come into contact with some steel kits. This creates a material basis for rust yellow. Also, as above, if the stone is not protected or the protection fails, it is easy to produce such rust in water and humid conditions.
Straight rust yellow
Third, this rust yellow is not good
This rust yellow from the bottom is the most troublesome kind of rust yellow. Why do you say that?
1, cleaning difficulties
1 Even if the surface of the rust yellow can be washed away, but the root of the problem - the steel behind the stone, iron frame, etc. - still, may be washed after the rust yellow will appear repeatedly.
2 This rust yellow has penetrated the entire board. This means that in order to remove the pollution, it is necessary to let the cleaning material penetrate through the entire sheet. After the rust yellow is decomposed, the decomposed material is also taken out of the sheet. It can be imagined how difficult the difficulty is and how bad the effect is.
3 The most important: this rust yellow is formed by mixing rubber pollution. It is easy to remove oil alone or simply remove rust. However, this mixed type of complex pollution is indeed more difficult to clean.
In summary, this rust yellow is not good. Even from a professional point of view, it is difficult to ensure and predict the effectiveness of cleaning by using the best cleaning materials. This is not incompetent in the stone care industry. It is indeed because the pollution situation is complicated and the cleaning is quite difficult.
2, the proposed method
So what should I do if I encounter this situation?
Our suggestion is that this rust yellow treatment should be more careful. It is best to choose the processing method based on the results you want. Here are three ideas and suggestions.
1 If you want to make the rust yellow lighter, do not affect the appearance too much. It is recommended to use the “rust removal and glue removal†material together. If the "VD marble rust remover" and "VD stone degreasing remover" are used together, the application can be mixed to achieve partial cleaning effect.
It should be noted that the cleaning effect of this pollution is really difficult to explain, and there is still the possibility of recurrence.
2 If you need to eliminate rust yellow. You can cut off the small piece of rust yellow stone and replace it with the same stone. At present, the stone repair technology has been advanced, and this partial replacement can be achieved.
3 If the quality of the decoration is high. Whether cleaning or partial replacement does not achieve the desired effect, the best way is to replace the sheet.
Handle caution
Note: Regardless of the method, it is recommended to do the stone protection after the completion. Moreover, it is best to use a high-quality osmosis protective agent to provide a high standard of protection for the stone to avoid the same problem in the future.
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