Sapphire glass: This kind of mirror has very stable physical and chemical properties and high hardness. Second only to diamonds, it can easily cope with scratches, wear and erosion. However, hesitation hardness is too high, toughness is not good, and I am afraid of falling. But many high-end watches will choose this kind of mirror!
Mineral glass: the mirror made of this material is characterized by strong vertical strike resistance and excellent wear resistance. This kind of mirror is widely used in mid-range watches, and the mirror of general military watches will also use this kind of high-hardness glass.
Synthetic glass: also known as plexiglass, another name is Alec glass. Mirrors made of this material are not very hard and scratch easily. But its willfulness is very good and it is not easy to break down. The cost of synthetic glass is very low, and many low-end watches generally choose this mirror.
How to identify the material of watch glass
First of all, you can tap the mirror and judge the material of the mirror from the sound. Acrylic mirror will make a sound similar to plastic, and mineral glass will make a louder sound. In terms of weight, acrylic mirror is the lightest and sapphire mirror is the heaviest.
In addition, sapphire has good thermal conductivity. Therefore, if you touch it with your hands, you will feel cold.
Finally, the mirror surface of sapphire is much smoother than the other two materials. Therefore, if you drop a drop of water on the mirror of sapphire, it will not disperse easily, while other materials will.
(The above content is taken from the watch house)
As for the watch mirror, we often hear the word "sapphire mirror". What is the mystery of this so-called "sapphire" and what is the difference between it and the ordinary watch mirror?
The so-called "sapphire" here is not a natural sapphire or jewelry, but a synthetic one, which can be produced under certain conditions.
The reason why it is used as a watch mirror is because its hardness is very high, second only to diamonds and diamonds, and it has the functions of anti-wear and anti-corrosion.
Although the hardness of sapphire mirror is high, it does not mean that it will not be scratched, but will be damaged by hard objects like concrete walls around it under strong impact.
Besides sapphire watches, what other materials are there?
1. Acrylic mirror is soft and highly plastic, but it is easy to scratch, but it can also be easily restored by polishing.
2. The mirror surface of mineral crystal glass has a wide range of sources and is very convenient to obtain. The hardness is moderate, and the Mohs hardness is about 4~6.
Compared with acrylic and mineral watches, sapphire is superior in material, so there is a phenomenon that watches on the market are not all digital. How to tell if it is a sapphire watch? Here are some tips for everyone.
1, look at logo. Generally, regular brand watches will be printed with sapphire glass on the dial or back cover, which is expressed by English sapphire or sapphire crystal.
2. Breathing method. On the surface, sapphire crystal glass quickly dispels the fog. Generally, when you put your mouth away from the top of the watch mirror, it disappears, and then you can't see the fog on the surface.
3. Knocking method. Tap the surface gently with your nails. Remember, be gentle. If the sound is dull, it is sapphire crystal face. If it is ordinary crystal or glass, the sound is crisp.
4, light scraping method. Scrape the watch mirror with your nails. If there is a sense of hysteresis, it means that the material of the watch mirror is ordinary crystal. If it feels smooth and has no resistance, it is sapphire.
5, dripping method. Drop a drop of water on the surface, and then stand the surface upright. The water drops don't scatter, but slide down slowly. This is a sapphire mirror, other materials will come loose.
Choose one or two of the above methods to test. If you are really uncertain, you'd better choose some surface lines to identify them.
There are many empirical methods to identify the mirror surface of sapphire watches, such as sapphires that dissipate quickly by steaming, sapphires that punch holes by knocking, sapphires that slide quickly by dropping, and so on. In fact, it is not easy for inexperienced people to operate. A better way is to look at the logo, which generally has the material description of the mirror glass. For second-hand watches, if it is not a long-term rough scratch, it may generally be sapphire. Until the 1970s and 1980s, even in the Swiss watchmaking industry, in order to save costs, many low-end products did not use sapphire crystal glass to make mirrors. Now, sapphire has become a standard configuration, most watches are sapphire glass mirrors, and only a few antique styles will use relatively soft mirrors. In fact, this is more in line with the development trend of science and technology. Since the case steel is getting harder and harder, the glass will of course choose the hardest material.
This question may be difficult for the watch industry to answer, but it is also a simple question for our jewelry industry.
Hand surface is generally made of two materials, one is timely glass and the other is sapphire. There are two differences:
1, hardness:
The hardness of glass is lower, only the mode hardness is 5.5 degrees, while sapphire is 9 degrees. The dust in the air is timely and the hardness is 7 degrees. So if the hardness is below 7 degrees, it will wear off for many years. In other words, sapphire is more wear-resistant than timely glass.
2. Gloss:
Sapphire is brighter than seasonal glass and looks more tasteful.
The above two points are their differences. Now let's introduce the manufacturing process of sapphire mirror. Sapphire used in the field of watches is not natural sapphire, but a crystal synthesis technology called "crystal pulling method", which is used for watches.
Next, the key point is to identify whether it is a sapphire mirror:
1, with our jewelry detection method, it can be easily distinguished within 2 seconds on the infrared spectrometer;
2. Using our jewelry detection method, the detection of refraction value can be completed in a few minutes;
3. Test and compare the hardness of sapphire and glass by measuring the drilling rate of diamond. The hardness is sapphire mirror and the hardness is glass.
4. It can also be identified by thermal conductivity. Glass has poor thermal conductivity. Sapphire has much stronger thermal conductivity than glass. In the same windless temperature environment, the diffusion speed of sapphire is much faster, while that of glass is slower. This method is used in winter or in air-conditioned rooms;
5, look at the gloss contrast, sapphire mirror luster is strong, much brighter, and there is a layer of blue halo.
All right, that's the answer. I hope you are satisfied with the answer given by the Royal Jewellery Appraiser FGA.
Sapphire mirror, water drop, dripping on the mirror is a small point.
Shenzhen zhenxinfu jewelry co., ltd
17 minutes ago
This question may be difficult for the watch industry to answer, but it is also a simple question for our jewelry industry.
Hand surface is generally made of two materials, one is timely glass and the other is sapphire. There are two differences:
1, hardness:
The hardness of glass is lower, only the mode hardness is 5.5 degrees, while sapphire is 9 degrees. The dust in the air is timely and the hardness is 7 degrees. So if the hardness is below 7 degrees, it will wear off for many years. In other words, sapphire is more wear-resistant than timely glass.
2. Gloss:
Sapphire is brighter than seasonal glass and looks more tasteful.
The above two points are their differences. Now let's introduce the manufacturing process of sapphire mirror. Sapphire used in the field of watches is not natural sapphire, but a crystal synthesis technology called "crystal pulling method", which is used for watches.
Next, the key point is to identify whether it is a sapphire mirror:
1, with our jewelry detection method, it can be easily distinguished within 2 seconds on the infrared spectrometer;
2. Using our jewelry detection method, the detection of refraction value can be completed in a few minutes;
3. Test and compare the hardness of sapphire and glass by measuring the drilling rate of diamond. The hardness is sapphire mirror and the hardness is glass.
4. It can also be identified by thermal conductivity. Glass has poor thermal conductivity. Sapphire has much stronger thermal conductivity than glass. In the same windless temperature environment, the diffusion speed of sapphire is much faster, while that of glass is slower. This method is used in winter or in air-conditioned rooms;
5, look at the gloss contrast, sapphire mirror luster is strong, much brighter, and there is a layer of blue halo.
All right, that's the answer. I hope you are satisfied with the answer given by the Royal Jewellery Appraiser FGA.
Looking at the sky through the surface floodlight, the purple glow is sapphire.
Remember, it's a drop of water, and it doesn't disperse.