Black marble contains calcite, forming a texture or a glassy or cloudy structure. The variety of clusters formed in this way is usually the place where natural stone attracts people. However, natural black marble will inevitably have some cracks and small holes, but these cracks and holes are not desired by people, especially black marble and similar stones, where every irregularity appears very dazzling. As for the small defects of these black marble, we do not have a way to deal with them. Just follow the steps below to deal with these small defects: Black marble production example picture 01. Black stone processing - strengthening, polishing and further processing These boards, when used for kitchen counters, may end up with a different color, usually a lighter color than the surface, at the corners.
This is because the epoxy is unlikely to penetrate the entire slate. In this case, you can use a special product that deepens the color of the black stone. While ensuring the heavy-color protective agent for the stone, it can also ensure that the natural black marble has a high-quality penetration protection effect. Can be used on entire kitchen worktops, floors and stair treads.
Black stone loses its elegant appearance and high-quality appearance if it is treated in other ways than polished. For example, "Shanxi Black", "Panama Black" or "Gypsophila" and "Night Snow", etc., after anti-skid treatment such as sandblasting or heat treatment, they will be off-white, which does not look eye-catching at all. In the stone production industry, more and more practitioners use resin to process these black stones, fill the holes on the stone surface, and make the stone surface look consistent.
After cutting, these stone slabs cut from the blocks are cleaned, roughly ground, then heated and coated with a very low viscosity black epoxy adhesive (used to allow the resin to penetrate the surface of the stone for enhanced effect) . These adhesives penetrate very fine capillary cracks and pores, enhancing internal bonding and ensuring a sealed natural stone surface. After about 24 hours of curing, these slabs can be further ground and polished.
Due to the relatively long curing time of this epoxy glue, the color of the treated stone is more or less darkened. In order to be able to process this type of stone within a relatively economical range, the back of the stone slab is strengthened. Apply a free-flowing epoxy glue to the entire unfinished back of the slate.
The fiberglass backing is then glued to the glue coat and a second coat of epoxy glue is applied. When this reinforcing layer has cured, the front of the slab can be filled. Since marble and limestone are only suitable for interior use, these holes and larger pores on the surface can be filled with a quick-drying polymeric resin product. After a few minutes, when these products cure, the stone can be ground and polished.
02. Penetration protection of black stone When dealing with many kinds of dark stones, the penetrating protection agent will cause the color of the stone to change, which is usually the effect that needs to be achieved. However, many natural stones react differently to penetrants and may even eventually lead to stains. This can occur on rough materials such as quartzite and gneiss, other varieties such as Norwegian Pillarguri, also known as OttaPhyllite, also lose their three-dimensional, shimmering effect of their spaces if penetrants are used.
A special penetration protection product - nano antifouling agent should be used for these sensitive natural stones. This product should be used on clean and dry surfaces. Remove excess material after 5-10 minutes.
The penetration protection effect can be completed in only 2 hours. The product will not cause a change in the shade of the stone. 03. How to grind and renovate black stone After grinding, black stone tends to turn white and is not easy to shine.
Today I will discuss with you how to grind and refurbish black stone. 1. Reasons for black stone turning white 1. Insufficient grinding optimization The primary reason for black stone turning white is three words: not grinding well. It should be pointed out that it is forbidden to skip numbers when grinding black stone.
If the number is skipped, there will be a situation of "can't hold down the number", which means that the next level of grinding plate cannot hold down the scratches left by the previous level of grinding plate, and it will inevitably turn white. 2. Black stone can't cover scratches. In fact, no matter what kind of stone scratches are white. Let’s recall, in daily life, everything from small scratches on the protective film of mobile phones to large scratches on cars of various colors are all white without exception.
This phenomenon is determined by optical principles and has nothing to do with material and color. Therefore, the ability of black stone to cover scratches is the lowest. Grinding scratches, scratches caused by coarse particles of grinding discs, and scratches caused by sandy soles are all likely to make black stone gray and white.
3. Black stone is easy to pollute. Maybe some people think that black stone should have strong pollution ability? This understanding is wrong. Black is a color with strong contrast. Dust, stains, and pollution are all easy to appear on black stone, resulting in gray and white visual effects. 4. The relationship between "color" and "brilliance" of stone The color of stone comes from the true color of the minerals contained in it.
Therefore, the blackness of stone mainly depends on showing the true color of its own minerals. So how to do it? We all have this experience: when water is poured on the stone, the color of the stone becomes moist and transparent. This is because water fills the unevenness of the stone surface during this process, revealing the true color of the mineral.
This process actually optimizes the stone surface. When grinding 50#, it turns white, when grinding 300#, it turns gray. After grinding 3000#, when the gloss reaches 65 degrees or more, the natural color of the stone becomes clearer and clearer. Therefore, the higher the gloss, the brighter the color of the stone.
Second, the solution 1, do a good job of protection Black stone is easy to be polluted by dust, pigment and other substances, so it should be well protected. 2. Grinding optimization The grinding optimization stage of black stone should be done well, 150#+300#+500# or 200#+400#+800#, it needs to be continuously cross-grinded for more than 3 times, the more times, the more uniform the bottom of the stone The color will be clearer. 3. Prevent scratches ①. During the construction, prevent the gravel or hard objects brought by external factors from scratching the ground.
②. Clean up the mud on the site and the mud of the machine itself in time to prevent the debris from scratching the ground and keep the ground highly clean. ③. Prevent coarse-grained scratches on the grinding disc. Solution: When grinding, if you find protruding particles on the grinding disc, remove them with a needle or blade.
The above is the sharing of tips about the production, processing, renovation and maintenance of black stone. I believe that through the above methods, the black stone produced and maintained can make up for its flaws and show its moving beauty like black jade.