How to solve the yellowing problem of white marble？

Once you find that the surface of white marble is yellow, you must first find out the reason for the yellowing. Before turning the suspected cause of yellowing into rust-related, first make sure that the yellowing is not caused by aging wax or other external factors. After eliminating factors other than iron, start preparing for rust removal.

At present, there are various brands of iron remover and yellowing agent in stone care shops. While no product discloses the basic chemical composition, most iron and yellowing agents on the market are acidic. Due to the poor acid resistance of marble, many acid rust removers have great corrosion on the surface of the plate while removing rust. Excessive erosion of the marble surface can cause permanent damage to the surface.

Therefore, when using rust remover, remember to stick several layers of toilet paper on the stone surface when removing yellow, and then pour the rust remover on the paper. Wait for about two hours, the yellow will gradually fade, after a few times, the yellow can be removed. Professional stone care workers generally use mildly acidic or even neutral cleaners to minimize damage to the stone.

For stubborn rust spots, the sticking method is used, that is, the rust remover and diatomaceous earth are mixed with water to make a paste, and then the paste is applied to the rust spots, covered with plastic film, and sealed with tape. After 24 hours, remove the dry paste. After removal is complete, use a special cleaner to collect the dissolved iron.

This last step is very important, because during the rust removal process, when iron ions diffuse to the board surface, if the diffused iron ions on the board surface are not collected, secondary yellowing will soon occur, and the area will be larger. Wide. Of course, you can also remove the yellow yourself at home (as shown in the picture below)

In view of the fact that slate rust removal is a professional work, it is not recommended for non-professional owners or non-professional caregivers to buy unfamiliar rust removers to remove the macular or rust spots of the stone, so as to avoid improper use. Stone.