If you accidentally pencil yourself, you are not lead poisoning because the pencil is lead-free and contains clay and graphite. Of course, if you sting someone else, you may be accused of intentional injury and go to court...
Why is pencil leadless but pencil?
It was because in the fifteenth century, graphite was found. At that time, people did not know the composition of graphite. They called graphite “black lead.†Around 1492, the British began to use graphite-made pens. Known as the pencil, it was not until 1779 that scientists knew that graphite was a form of carbon, but the name pencil was used.
Don't look at the small pencil. Its use can be more than just writing!
1, distinguish diamonds
After the wet pencil stroke is true diamond
Since the diamond is currently the hardest stone in the world, it is difficult to be scratched and scratched by other sharps. Therefore, a “pencil†method invented by a former Soviet gem scientist is the most effective and convenient authentication currently recognized in the industry. method. First wet the diamonds with water, and then use a pencil to gently trace the faces of the real diamonds. The area where the pencil is stroked is without leaving marks; but if it is made of crystals, zircons, etc. Will leave traces. Compared to zircon, crystals leave a particularly deep trace, and zircon
The traces are faint. How, simple, everyone can also identify the authenticity of the diamond, no longer afraid to buy fake it!
2. The lead powder of the pencil can be used as a lubricant and can be temporarily used for makeup when performing.
3. When there is a dangerous situation in the wild, the pencil can also be used as a straw to drink the water in the stone seam.
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