The mirror of a watch is a method of identifying sapphire glass
How to distinguish the mirror of the watch is the sapphire window piece glass? At present, there are three main aspects of "laboratory method, drip method and the identification of watch and the hardness of glass".
Methods / steps
1, laboratory method, which is not suitable for our consumers, because we can't run a professional watch to identify a watch, and it is generally not free. This is labor and money. Is there a simple method of identification? There is, of course, and can be identified at the site. That is the "drip method and the appearance identification method".
2 drops of water. It is said that the method of dropping water to measure sapphire glass is to drop a small drop of water on the surface of the measured glass. If the water droplet is obviously raised as a bead, it is sapphire glass. If the droplet spreads away, it will not be sapphire glass. Any liquid things, little droplets in the medium surface of a smooth, there will be a different level, the specific circumstances and have characteristic of medium temperature, called liquid tension, angle is also useful, including the watch with the form of oil has the technical index. It is the reason that the density and proportion of sapphire are larger, the surface is more smooth and delicate.
3 appearance identification method. Is the watch's logo and glass hardness: if you are a regular brand watches, sapphire glass usually printed on the back cover above the watch, represented by English SAPPHIRE or Sapphire Crystal, now even fake or counterfeit watches, use of sapphire glass is also very common. The hardness of the watch glass can be tested by a needle like sharp metal. It can be scratched on the edge of the glass. The most improper eye is hard. There is metal sensation. The glass is not scratched. It should be sapphire glass.