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2023

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03

How many mesh sizes is best for crystal powder polishing?

作者:


Crystal powder is currently the most widely used polishing material, which is easy to carry, high in luminous efficiency, and has good effects, making it widely popular. However, there are various types of crystalline powders, and different people have different operating habits when using them. For example, some people grind to 3000 # to make powder, some people grind to 2000 #, and some people grind to 1000 #.

Crystal powder is currently the most widely used polishing material, which is easy to carry, high in luminous efficiency, and has good effects, making it widely popular. However, there are various types of crystalline powders, and different people have different operating habits when using them. For example, some people grind to 3000 # to make powder, some people grind to 2000 #, and some people grind to 1000 #.

So, is this difference just a difference in habits and has no essential impact on the lighting effect? Actually, it's not. Let's analyze the impact of grinding to different mesh sizes on the luminous effect of crystal powder, and provide the best reference for everyone.

Stone crystallization

1、 Differences in polishing principles

The ability of stone to emit light requires two steps: grinding and crystallization. Let's take a look at the principles that can affect the effect of light emission in these two steps.

1. The difference between 1000 # and 3000 #

The general understanding for 1000 # grinding discs and 3000 # grinding discs is that the mesh size is higher and the abrasive material is finer, that's all. But there is actually a huge difference between them, namely:

The main function of the 1000 # grinding disc is still the grinding function of the abrasive. But when it reaches 2000 # and 3000 #, the proportion of this grinding function is decreasing. At the same time, the proportion of resin demolding and filling functions in the grinding disc is greatly increased.

The fundamental difference between 1000 # and 3000 # grinding discs is the proportion change of the two functions of "grinding" and "filling". That is to say, the current manufacturing principle and process of grinding discs determine that the filling effect of resin accounts for a large proportion in the light output effect of 2000 # and 3000 #. And resin is a necessary material for most grinding disc manufacturing, which is indispensable.

1000 # and 3000#

2. The Luminescence Principle of Crystalline Powder

At the same time, compared to most other crystalline materials such as agents, slurries, and ointments, the polishing principle of crystalline powder involves a higher proportion of chemical etching of acidic materials such as oxalic acid and fluorosilicic acid.

This is a significant characteristic that distinguishes crystalline powder from other materials, and it is precisely because the chemical action of the powder is relatively "intense" that it can achieve fast light release. In the polishing principle of other materials, the filling effect of resin and wax components accounts for a higher proportion.

2、 The Influence of Different Mesh Numbers on Polishing

1. The impact of 'resin isolation layer'

During construction, when grinding to 1000 #, the flatness of the ground has basically formed. And the following 2000 # and 3000 # rely more on resin filling, optimization, and improvement to higher glossiness. So, by grinding to 1000 #, the foundation of the ground has been laid. By utilizing the strong chemical etching effect of crystalline powder, good results can already be achieved. A typical example is VD marble gold powder. Due to the use of imported fluorosilicic acid components and high-performance resin, grinding to 1000 # can achieve excellent results, while the effect will decrease if it is higher than 1000 #.

The most important key point is that for the 1000 # grinding disc, the proportion of resin filling function is very low, which means that after the 1000 # grinding is completed, there is no "resin isolation layer" formed by resin condensation on the ground. Therefore, the powder can fully contact the material composition of the stone at this time, enabling chemical etching to proceed well.

However, if ground to 2000 #, 3000 #, and even some people will grind to 6000 #. Some people also use sponges made of resin for polishing and grinding.

Starting from 2000 #, the resin demolding and filling function in the grinding disc has been greatly strengthened. This will form a "resin isolation layer" on the surface of the stone. And the higher the mesh size, the thicker the "resin isolation layer". Grind to 6000 #, or use resin sponge to polish, let alone.

2. Separated from chemical etching

As mentioned earlier, the most core principle utilized in the development of powder materials is the chemical etching effect of oxalic acid and fluorosilicic acid.

However, the "resin isolation layer" formed by grinding to 2000 # or 3000 # blocks the contact between these acidic materials and the components of the stone itself, greatly reducing the efficiency of the chemical etching process. Meanwhile, water is also a key factor in the crystallization process of stone. By soaking in water, the calcium carbonate component in marble can be softened, which is beneficial for etching.

But the "resin isolation layer" separates both water and crystalline powder, which naturally greatly reduces the effect of light emission.

At the same time, many crystalline powders also contain resin components, but the resin in the powder and the resin in the grinding disc are not the same type of resin. Not only will it not have a filling effect, but it will also lead to fights with the "resin isolation layer". The specific manifestation is dimness and lack of light, with extremely poor results.

Low Gloss

3、 Conclusion

In summary, when polishing with crystalline powder, the effect of grinding to 1000 # is * * * *.

Due to the main principle, which is the "resin isolation layer", little attention has been paid to it. This makes many veteran engineers who have been working in engineering for many years not very clear, so sometimes they are accustomed to achieving 2000 # or 3000 # polishing, which not only fails to produce results, but the acidity of the crystal powder also burns away the basic glossiness that has already been ground.

So sometimes it's not a matter of powder, it's just this "resin isolation layer" that's causing trouble. When you find that the powder won't shine, you can try grinding it to 1000 #. Eliminating the grinding of two grinding discs can also bring better results. Why not save time and effort?

4、 Extended Interpretation

Some people may wonder why materials such as agents, slurries, and ointments can be ground to 3000 #?

The answer is also mentioned earlier. Because most agents, slurries, and ointments contain wax components, the filling effect of wax on the resin isolation layer is very good. Therefore, agents, slurries, and ointments can be made after grinding 3000 #. Moreover, some agents, slurries, and ointments must be ground to 3000 #, as the proportion of chemical etching principles in these materials is relatively low and they must rely on the filling effect of wax to produce light. Therefore, the requirements for the ground substrate are high.

Similarly, when using the sealing technology for polishing, due to the principle of covering and film forming with silica, this is a physical action and there is no chemical etching process. Therefore, the sealing technology has higher requirements for the foundation ground from stone, and to make the sealing glaze, it needs to be ground to 3000 #.

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