It turned out that there was a button on Lin Yuan's pen, Lin Yuan pressed it gently, and a red light shot out from the pen and hit the screen, and everyone speculated: What is this red light?

It turns out that Lin Yuan's pen is a laser pointer, which can shoot a red laser, this laser intensity is relatively low, and it will not cause harm to the human eye. ”

"Therefore, when we are exhibiting, we have to put the cultural relics in the darkroom, and we must strictly control the light source, and the light emitted by the light source must not have ultraviolet components."

One of the experts below raised his hand and said: "The exhibition is for people to see, and ancient books also need to be looked at often, so we can study the written information recorded on it, if it is placed in a dark room, what will people think, I think it is better to bury them in the ground!" ”

When other experts heard these words, they all snickered, and Lin Yuan said: "We have an advanced and intelligent lamp, which can be lit when someone is approaching, so as to protect cultural relics to the greatest extent!" I also brought you a sample lamp today. ”

After Lin Yuan finished speaking, he asked his entourage to take out a small black box from his baggage, with a delicate light bulb on it, and then Lin Yuan said, "Who wants to come on stage to try this kind of lamp." ”

Elena's father, the director of the Bibliothèque de Paris, stood up and said, "I've come to see what's so strange about this lamp." ”

The curator walked up to the stage, Lin Yuan pointed to the light bulb and smiled: "Please put your hand on the light bulb." ”

The curator asked, "What is this for?" ”

Lin Yuan smiled: "This is a smart lamp, if you put your hand on it, it means that someone is close to the bulb, and the bulb will naturally be able to know the way, so it will light up." ”

The curator hesitated and said, "Is it really that magical?" As he spoke, he put his hand on the light bulb, and saw that something magical happened, and the light bulb suddenly actually lit up!

In fact, the principle of this "smart lamp" is very simple, there is a magnetistor in the circuit, the resistance value of this resistance will change when the magnetic field changes, the human body itself is a huge electromagnetic field, so when the human body approaches the electric lamp, the resistance value will become smaller, and the bulb will light up.

But the curator didn't know these truths, so he was very surprised when he saw the light bulb light up, and the people below were the same, seeing the light bulb light up, they all exclaimed, the curator withdrew his hand, the light bulb went out, put his hand back, the light bulb then lit up, the curator said to Lin Yuan: "I really can't imagine it, you are still an inventor!" ”

Lin Yuan smiled and nodded, and said: "In fact, light is only one aspect that should be paid attention to when preserving, there are many important aspects, now please ask someone to bring up that batch of paper cultural relics, and I will show you how to deal with it before preservation." ”

Two librarians brought up two glass cabinets, Lin Yuan took out a pair of white gloves from his pocket and put them on, and said, "The sweat on people's hands can corrode these papers, so you must wear gloves when you touch these papers." ”

Lin Yuan gently picked up a piece of paper without words with tweezers, put it on the table, and then said: "I will put this paper under the projector in a while, and everyone can see my operation process from the screen at that time, but the light of the projector is extremely harmful to the paper, so I chose a piece of paper without words." ”

Lin Yuan put the paper in the projection area of the projector, and a magnified image of the paper immediately appeared on the big screen, Lin Yuan pointed to a mud spot on it, and said: "Paper is composed of cellulose, and the existence of such mud spots will reduce the mechanical strength of the paper and increase the probability of mechanical damage to the paper, so they must be removed." ”

Lin Yuan called the assistant over, set up a shelf on the table, put an alcohol lamp underneath, and when the assistant set up the shelf, Lin Yuan said, "How should the mud spots be removed?" I believe that you should have some experience and experience, the easiest way is to wash with water, but before washing should be on the paper written words and paintings for testing, if you find that the color will fade when washing, then the washing method can not be used. ”

Lin Yuan said: "I will now show you how to remove mud spots from cultural relics that cannot be washed. Lin Yuan turned around and pointed to the shelf, below was the alcohol lamp, there was a sink on top of the alcohol lamp, and on the top of the sink was a shelf made of iron wire, and cotton was placed on the shelf.

Lin Yuan took a bottle of liquid from his assistant, poured it into the sink, and said, "This is not water, but something called trichloroethylene, which your country cannot produce now." "Actually, Lin Yuan is deceiving people, this kind of thing is actually taken from the Curie couple.

Lin Yuan poured trichloroethylene into the sink, then put the paper on the cotton, lit the alcohol lamp, and after a while, a strange fragrance wafted out, Lin Yuan said to the assistant: "Go and open the doors and windows, this gas is poisonous, you can't suck too much." ”

Lin Yuan saw that it was almost cleaned, so he turned off the alcohol lamp, and then Lin Yuan picked up the paper, only to see that it had been renewed, and those mud spots were gone, Lin Yuan asked the assistant to remove the shelf, and then took out a beaker, filled it with water, took a small piece of paper and put it inside, and then said: "What I want to do now is to test the acidity and alkalinity of the paper." ”

"I've said more than once that paper is cellulose, and acidity can speed up the hydrolysis of cellulose, so it's important to remove the acidity of paper artifacts." Lin Yuan said and took out a note of paper and said: "This is a test strip, if the paper is acidic, this test strip will turn red, unlike the test strip used in ordinary chemical experiments, the sensitivity of this test strip is very high!" ”

Lin Yuan put the test paper on the table, and saw that the paper in the beaker had become confetti, so he dipped some liquid with a glass rod and dripped it onto the test paper, and the test paper suddenly showed a bright red color, Lin Yuan picked up the test paper and said to everyone: "Everyone has seen it, the test paper has turned red, indicating that this paper is acidic, and we have to use methods to make it alkaline now." ”

Lin Yuan said and took another bottle from the assistant and said, "The bottle is filled with ammonia, and I will use this thing to make the paper alkaline." Lin Yuan said and poured the ammonia into the sink, and suddenly an unpleasant smell floated out, Lin Yuan fumigated for a while, and then took a small piece from the paper, this time the test was carried out, and the paper had become alkaline.

Lin Yuan looked at everyone's surprised expressions, and knew that they were almost shocked by what they demonstrated, so he smiled and said, "Why don't you discuss it for a while?" ”

Accompanied by Lin Yuan's words, there was a heated discussion below, and the curator said to an old man beside him, "What is the thing that this person demonstrates?" Is there any scientific justification? ”

The old man said excitedly: "This young man is really amazing, the effect of acidity on cultural relics that he said is something that I have studied all my life, and he can actually know the Tao!" ”