Chapter 787 The first photo of three people
Looking at the vivid black and white image in front of them, the three of them were very excited. Ao Fei and Qu Bing were happy that the experiment was finally successful, while Wen Nong was surprised by the research results of the two.
He was really shocked. He had always known that the two were doing optical research, but he didn't know what they were doing. Seeing that the two had come up with such a heaven-defying technology, how could he not be excited.
Just as Qu Bing said, their technology can freeze time forever on the carrier, and it is a magical way to really change the way historical records are recorded.
Out of the spirit of scientific exploration and curiosity in his heart, Wen Nong immediately pestered the two to ask about the principle of this technology.
Ao Fei, who had already taken the photo, was in a good mood and did not hide it from him. He took him to visit his photo box. He sat on a chair and asked Wen Nong to stand in the photo box and observe the inverted image reflected on it with a frosted glass plate.
"Is this the pinhole reflection that your optics group studied? This is too amazing!" Wen Nong pushed and pulled the box with the lens embedded in it forward and backward according to Ao Fei's instructions, constantly adjusting the size of the image on the glass plate. Looking at the reflection that could be enlarged and reduced at will, he couldn't help but exclaimed.
"Then how did you leave the image on the silver plate?" Wen Nong continued to ask.
"It was Qubing's idea. I showed him the pinhole reflection a few days ago, and he asked if it was possible to leave the reflection. I have wanted to do this for a long time, but I have never had any clues. He said that your chemistry group happened to come up with a photosensitive material when making explosives, maybe we can try it, and then you know everything behind.
I was responsible for improving the box for taking pictures, and he was responsible for the selection of materials for the film and the cleaning of the reagents. It took several days to make this thing. Of course, the chemical technical consultant you provided also made an invaluable contribution. We will not take your credit, don't worry." Ao Fei sat on a chair with his legs crossed and ate an apple, looking very proud.
"Oh, then I'd like to thank you, but don't emphasize me deliberately, I didn't do anything, just provided the materials." Wen Nong said the words of refusal, but he was still very happy in his heart. Such a heaven-defying photo-taking technique, they want to give him a credit, then of course he has no reason to refuse.
After looking at the photo-taking box, Wen Nong went to Qubing to learn about the production method of the film. Qubing certainly did not hide it. Chemistry is not his strong point. He still hopes that Wen Nong, the chemistry master, can continue to improve the photo-taking technique.
"After many experiments, I now divide the technology of making photo-taking film into four steps. The first is to prepare the base plate. After testing, the best material is the silver plate, but the silver plate is too expensive. I am still thinking of using copper or iron plates with silver on the surface to try. If it succeeds, the cost of the photo-taking technique can be reduced. Otherwise, I guess it is difficult for ordinary people in our tribe to use this technology." Qubing introduced to Wen Nong in the darkroom.
"Well, what you said makes sense. Cost is indeed a problem." Wen Nong nodded in agreement.
"Then we need to brush the silver plate with silver nitrate solution and seal it in a dark box. The first step of preparation is completed. The second step is to use frosted glass to frame the image in the photo box. After fixing the focal length, put the silver plate in the position of the glass piece and open the sunshade on it. Let the base plate be exposed for four breaths, and then cover the sunshade. At this time, a dark shadow, or latent image, has been left on the base plate, which cannot be seen by the naked eye.
The third step is to soak the base plate with the sodium sulfite solution you gave, so that the silver nitrate on it reacts with it to reveal the image. I call this step development.
The last step is to terminate the reaction with a solution of reagent No. 17, also called fixing, to fix the image forever."
"This is really wonderful. With a few simple exposure, soaking and cleaning steps, you can get such a lifelike image. It's a pity that only a black and white image can be produced." Wen Nong said with emotion after listening to Qubing's introduction.
Qu Bing didn't feel sorry, and heard him say, "Brother Wen, we are counting on you for the color photography technique. My idea is to see if we can find a few things that change color when exposed to light, or react to dyes when exposed to light. In this way, we only need to get together a few different colors of photosensitive materials, and then apply a few more layers of different colors on the base plate, maybe we can make a color photography technique." "
Well, what you said makes sense, this is a feasible direction, I will pay attention to whether there are such photosensitive materials in my experiments in the future." Wen Nong nodded, but he didn't have much hope. Sometimes this thing really depends on fate and chance, otherwise he can't get the desired material, and he has no choice.
In the following time, the three of them naturally began to consolidate this technology and try to improve it. Qu Bing experimented with a silver-plated copper plate again. As said at the beginning, the second photo was taken for him, and the kid even dressed up specially.
The next morning, Qubing wore a freshly dried military uniform, his hair was combed sleek and shiny, and he also wore a hairpin, a pair of cowhide military boots, and a standard sword for the leader's personal guards on his waist. He pulled Benben over with excitement.
How could he forget Benben, who grew up with him at such a historic moment.
Still in the open space in front of the darkroom, Qubing rode on Benben and patted his thick-skinned shoulders.
"Benben, look at the camera, look over there." He pointed to Ao Fei and Wen Nong who were taking pictures of them in front and said.
Benben was eating grass. When he heard Qubing calling him, he turned around to look at him, and saw him pointing to the other side, so he turned his head to look over again.
Ao Fei just caught the moment when Benben turned his head, and quickly pulled out the sunshade to expose the plate. After a few breaths, he quickly ran to the darkroom with the plate, and Qubing followed quickly.
Wen Nong was in charge of developing the photos this time. He was also very interested in this technology, and chemical experiments were his strong point. He was more stable and faster than Qu Bing in operating. In less than two minutes, a black-and-white photo with a silver-plated copper plate appeared in his hands.
In the picture, Qu Bing held the sword on his waist with one hand and pointed at the direction of the camera with the other hand. Ben Ben looked at the camera with a confused face, holding a large bundle of grass in his mouth and forgetting to chew it, with a naive look on his face.
Qu Bing was also very happy to take this photo. Then the two of them pulled Wen Nong to take a photo of him. Then they found a researcher from the chemistry group and the optics group, and immediately took up the post after a simple training, and pulled the two into the big pit of photography.
The first thing to teach these two newcomers to take and develop photos was to take a group photo of the three of them.
This photo of the "Three Heroes of Photography" that was enough to go down in history in the Han tribe was finally delivered to Luo Chong two days later.
(End of this chapter)
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