Chapter 851 Ao Fei has trypophobia!
Another day passed, and on the third day, everything was finally ready. Ao Fei's camera was ready, and the manual stamping equipment of the mechanical group was also ready. Among the hundreds of copper cards that had been stamped and cut, one hundred had already completed the silver plating and polishing process.
Luo Chong made a simple check again and ordered the experiment to begin.
Luo Chong directly designated Ao Fei as the model for the ID card sample. Qu Bing was responsible for shooting and washing the film. He was the most experienced in this, and Luo Chong was very relieved.
Still in the bright optical laboratory at the beginning, Ao Fei sat upright on a chair. The windows and doors were open to increase the indoor light. On the side of Ao Fei, a silver-white iron sheet was hung to fill in the light, and his entire upper body was photographed in every detail. Qu Bing
fixed the box camera, first looked for the right focal length through the frosted glass, and adjusted the position of the film, as well as the framing. After everything was aligned, he pulled out the frosted glass and went to the darkroom in the back room to prepare the film.
In less than a minute, the boy ran out holding the film moistened by the liquid, quickly inserted the film into the camera, and then pulled out the shading plate. He then said hello to Ao Fei and asked him to sit and look at the lens. Then Qu Bing opened the cover of the lens and started to expose.
With the experience of taking photos before, the exposure time was just right this time. The exposure lasted for a total of eight seconds, which was about four breaths. Qu Bing then covered the lens again, and then restored the shading plate of the film to its original position. While the liquid on the film was not dry yet, he ran back to the darkroom and started to develop it.
The silver plate wet photography technology is like this. From preparing the film to taking photos, and then to developing photos, the whole process must be carried out when the plate is wet with liquid, so the speed must be as fast as possible.
As soon as Ao Fei finished taking the photos, he ran to the door of the darkroom and waited. At this time, Qu Bing was developing photos, and he couldn't open the door to go in, otherwise it would cause a second exposure to the film, so he had to walk back and forth anxiously in front of the door.
Luo Chong was quite calm. The worst that could happen was that he would lose a piece of film. He could afford such a small loss. Besides, he didn't have to take the photos himself. The advantage of being a leader was that he only had to open his mouth and give orders.
The speed of developing photos was relatively fast. Qu Bing carried out the developing steps in an orderly manner in the darkroom. He soaked the ID card base with the No. 17 developer. After shaking it slightly, the effect immediately appeared on the base and gradually became clear.
After the development process was over, he used bamboo tweezers to clamp the film out and rinsed it with clean water. After rinsing it three times, Qu Bing took out the film. At this time, the film development process had been completely completed, so there was no need to worry about the exposure problem.
Creaky - the wooden door of the darkroom was opened from the inside, and Qu Bing walked out with the ID card negative. Before Ao Fei asked, he took the lead in speaking to Luo Chong.
"Chief, take a look at it. I think it's quite clear, but I don't know how long such a photo can be preserved. I'm afraid it won't be able to withstand wear and tear!"
Ao Fei also took a look at the photo. There was no problem with the photo. The facial features of the head were clearly visible. However, this was a newly developed photo after all. How could it not be clear?
"Let me see."
Luo Chong took the copper card and looked at it carefully in his hand for a while. The framing of this ID photo was still very good. It was basically the same as the modern ID photo. It was also a headshot. The whole photo was taken from the hair to the clavicle, and the face and neck were all included in the lens. It looked very clear.
But as Qu Bing said, how long such an effect can last is a big problem.
Luo Chong looked at the photo and thought for a while before saying, "How about this, you take ten more photos according to the current effect, and then we will do a comparative experiment of wear and light to see how the effect is."
"This is a good idea. It's safer to experiment!" Ao Fei said in agreement.
Because he was originally engaged in scientific research, he naturally understood Luo Chong's theory. He had to be cautious in verifying it. How to verify it? Naturally, it was verified through a large number of comparative experiments!
The two of them soon became busy again, and took nine identical photos according to the previous steps. Then Luo Chong randomly took one and put it in a sealed wooden box to block light and oxygen for preservation, and took all the other nine photos for experiment.
Then he ordered, "Qubing, you go and call a few guards, and ask them to wipe the photos with linen, cotton, and silk respectively. Everyone must record the number of wipes. The people who use these three materials are divided into a group and conduct friction experiments on the photos in an indoor environment; then find a group of the same ones and put them under strong light for friction experiments. The last group of three materials is placed under strong light conditions, and the cloth is soaked in light salt water for friction experiments, simulating the degree of wear and tear when the clothes are exposed to the sun on a sunny day and soaked in sweat."
"Okay, no problem." Qubing agreed.
"I'll go find a few calcium carbide lamps to use as a light source for strong light." Ao Fei also found work to do next to him.
Luo Chong nodded in agreement, and the two immediately began to make their own arrangements, and then began the comparative wear experiment of the nine photos.
In theory, the silver plate wet photography technology should be the best for preserving photos, because it is not like the albumen paper made by Luo Chong. The influence of the photo only exists on the halogenated protein coating on the paper base. The image of the silver plate photo is directly penetrated into the entire silver coating. It is the chemical photosensitive change of silver that changes the structure of the entire silver layer.
In other words, the silver plate photo is more profound than the albumen paper photo, so the preservation time and wear resistance are naturally much higher than the albumen paper.
Luo Chong looked at their experimental process and stopped staring at it. Who knows how long such an experiment will take?
He took this time to visit the explosives workshop of the chemistry group to see how the researchers who just graduated from school are trained.
This small explosives workshop is under great pressure now. First of all, they are engaged in high-risk work. A non-standard or mistake will cause a serious accident.
They must first meet the ammunition consumption of the pure firearms army, mainly primers and double-base propellants. Only the laboratory of the institute can prepare small quantities of these. The Han tribe does not currently have the ability to industrially produce these things.
There is also a large amount of ether, which is an important catalyst for the synthesis of double-base propellants. It also has the effect of an aerosol anesthetic. If you smell it, you will basically faint.
So some time ago, the institute applied for a sum of money to build an ether preparation workshop on this windy island. This workshop is built like a shed, with windows and doors on all four sides, which allows the workshop to be fully ventilated and can also block the sun and rain.
Even so, the workers who prepared ether wore full-face gas masks that looked like elephant trunks before they dared to go in.
These gas masks were also produced by the rubber group of the institute. They were not seen outside the island and were only supplied in small quantities inside.
Normally, people from the institute did not dare to come here because the entire workshop was full of work on making ether or synthesizing propellants. The ether vapor inside was very serious. If outsiders entered the workshop without precautions, they would probably faint immediately due to inhaling excessive anesthetic gas, and in severe cases, they might even die of shock.
Even so, you can often pick up stunned water birds around the workshop, which shows the anesthetic effect of ether.
However, although the workers here work in a dangerous way, Luo Chong also pays them well. Not to mention the various benefits, the basic salary alone can catch up with three times the average income. Their salary is more than 90 silver dollars per person per month.
If there are no accidents in the whole month, there will be additional bonuses, which can make the workers more careful and active. After all, as long as they strictly abide by the operating regulations and avoid accidents, they can get more money, which is absolutely exciting.
In addition, this explosives workshop also specializes in preparing the potions required for photography, especially silver nitrate solution, and the production volume is very large, because this thing can not only make the film photosensitive, but also an important material for chemical silver plating.
Although photos and photography have not yet begun to be popularized in the Han tribe, silver-plated glass mirrors have become popular. As a result, silver nitrate, the main material for silver plating, has suddenly become in short supply.
And this is the current situation. If photo ID cards are really to be promoted on a large scale in the future, as an important agent for taking photos, I am afraid that the demand for silver nitrate will be higher at that time, and it may be in short supply at that time.
"It seems that we have to continue to expand the scale, otherwise it is unrealistic to talk about popularizing the civilian photography market!" Luo Chong muttered to himself after the visit, and then went to Ao Fei to ask for the microscope.
Luo Chong wanted to take advantage of the time when the guards were doing experiments to study the microscope, especially whether the microscope made by Ao Fei could reach a magnification of 1,600 times. This would be known after a try.
According to Luo Chong's experience in his previous life, it is known that red blood cells can only show a clear persimmon shape when they are 2,000 times larger, so whether they can be magnified that many times, we can know by looking at the blood with this microscope.
Luo Chong called Ao Fei over. This kid had seen some messy things before, but he had never seen blood.
"Chief, do you want to use this microscope to look at blood?" Ao Fei asked uncertainly.
"Of course, don't you want to be curious about what is in human blood? Will there be something that moves?" Luo Chong said jokingly.
"After hearing what the leader said, I'm a little scared." Ao Fei didn't know what he was thinking. In fact, he was very curious, but he didn't dare to look. What if there were really a lot of invisible small things moving around in his blood? Wouldn't it be scary to think about it?
But since it was Luo Chong who asked for the experiment, he naturally had nothing to say.
"What did you use to take the photos of mold last time?" Luo Chong asked Ao Fei.
"Oh, that, I made a super small tube camera myself, using glass negative film to take pictures, and then using an enlarger to put it on photographic paper. By the way, I still have the mold negative film. If the leader needs it, you can take it away." Ao Fei recalled.
"Tube camera?" Luo Chong asked puzzledly.
"Yes, it's in the drawer of this table." Ao Fei said as he opened the drawer and started to search. He soon found a super small camera. He said it was a tube camera. The main thing was that its lens was embedded, and there was a tube in front. Ao Fei demonstrated to Luo Chong that this lens tube could be put on the eyepiece of the microscope. The focal length of the box containing the negative film at the back was also fixed in advance. It was a fool-proof operation, very simple.
Just connect the camera, put the negative film in place, and then open the light valve, that is, the shutter, and expose the negative film for a few seconds.
Luo Chong learned how to use this thing after watching it once, and then began to experiment. First, adjust the reflector on the mirror holder so that the outdoor sunlight can be refracted by the reflector and the condenser, and the light beam is directly projected onto the stage.
Luo Chong found a dust-free slide that had been wiped with alcohol, first dripped a drop of water on it with a brush, then grabbed a personal guard, pierced his finger with a needle to get a drop of blood, and then dripped the blood onto the water drop on the slide, and finally covered it with a cover glass.
In this way, a piece of human blood specimen was completed.
While the blood just taken had not lost its vitality, Luo Chong immediately began the microscope experiment.
He fixed the slide on the stage, and the sunlight outside the window was refracted continuously by the reflector and the condenser, and finally cast into the drop of blood on the slide.
Luo Chong took a look at the size of 500 times, and saw that in a white background, there were many dense black dots swimming irregularly in a halo.
He hurriedly called Ao Fei to come and see, "Ao Fei, come and see, you can see things at only 500 times, look at those small dots swimming in the human blood." Luo Chong said with a smile.
Ao Fei couldn't help shivering when he heard it, but he couldn't refuse the leader calling him, so he took a brave look, but the boy was so scared that he retreated again and again, cold sweat quickly broke out on his forehead, goose bumps appeared on his arms and back, and his face turned three points pale.
Luo Chong was puzzled, so he asked, "What's wrong? They are just some small dots that move. They are not that scary, right?!"
"Chief, Chief, no, I feel sick when I see densely packed things. If they are dead objects that don't move, it's okay. But if they are moving objects, I feel uncomfortable. I don't know why?" Ao Fei held the table for a while before speaking.
"Damn, this kid actually has intensive phobia?! I give up," Luo Chong muttered in a speechless voice.
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Recommend a friend's book "I Said I'm Not a God of Destruction" Introduction:
In the previous life, he was besieged by strong men and betrayed by his brothers, causing him, a generation of genius, to die with hatred.
In this life, for revenge, he rebuilt his martial arts and absorbed negative energy to become the dark boss.
(End of this chapter)
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