Summary of practical experience of stone maintenance

One: Not all natural stones need protection

If it is only waterproof and alkali-proof, some high-hardness and high-density stone materials can not be protected in the ten-hanging construction. This situation also applies to some coarse-grained granite.

For example, in the coarse magmatic rock obtained by slow cooling in igneous rocks, there are a lot of large pieces of quartz, and the low and very dense quartz surface water and other pollutants cannot penetrate. This theory has been confirmed and approved by Maurizio, a conservation expert of the American International Stone Association.

Which materials need to be protected and which stones do not need to be tested. The test method is to drip water on the polished marble surface or drip vinegar on the polished granite surface. If there are no water spots or vinegar spots remaining after drying after 5 minutes, then this type of marble or granite is not Do protection. This is basically the case for the "Huaan Jade" marble produced in Fujian.

The cantilever mosaic automatic cutting machine is mainly used to divide the polished tiles into high-grade mosaics of various specifications. It is equipped with a self-made pressure plate to cut 10X10 mosaics and can process various shapes, such as diamonds, hexagons, etc.; chamfering at the same time, No manual reprocessing is required at all. When dividing small mosaics, the bricks can be stabilized to ensure that the divided small bricks will not fly out.

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Two: rust spots and yellow vomiting should be distinguished

Many times, the yellow spots on the stone are mistaken for rust spots. Rust spots contain iron, which can generally be removed with rust remover. There are generally two causes of the macula, which are easily confused with rust spots.

One is that the organic additives in the cement penetrate into the surface through the pores of the bottom surface when the stone is wetted and filled, the double bond of the organic component breaks under the condition of water and oxygen, and the color turns yellow. This situation is more common in wet pasting and filling white hemp stone.

Another situation is that in beige marble because the alkali spot spreads to the surface to absorb crystal water to produce a gel layer, the color of the alkali spot becomes darker after changing the light refraction, which seems to be "more yellow", but it actually contains crystal water. The gel layer is making trouble, so these causes of the macula cannot be solved simply with rust remover. It is necessary to prescribe the right medicine, otherwise it is likely to get worse.

Contact:

Daisy Huang

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Email:daisy@dafonmachine.com

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