Chapter 794 Three Roujiamo

"Haha." Luo Chong looked at Qubing's anxious look and laughed twice, then looked at Zhan Ying beside him and said, "You come and tell them how to make this photographic paper, after all, it's you who made it."

Zhan Ying also covered his mouth and laughed secretly, and Qubing and Ao Fei looked at Zhan Ying in disbelief.

"You don't have to look at me, this is what the leader told me to do, mix egg white and salt, and then after clarifying, evenly apply the salted egg liquid on the paper to dry, and I don't know how to do it afterwards."

"Then I gave it to you directly. After the paper coated with egg white is treated with silver nitrate for photosensitization, it becomes the photographic paper you are using now." Luo Chong added on the side.

"This, this, just use salted eggs? Can you make photographic paper? Leader, what is the principle?"

Qubing stuttered for a long time, and was surprised by Luo Chong's tricky operation and couldn't speak. He couldn't figure it out, just adding some eggs and white salt, how can ordinary paper be turned into photographic paper that can be developed?

"In fact, this is the same as what I said about the negative film. The gelatin I asked you to apply on the glass negative film is actually a kind of high-purity collagen. The purpose of applying gelatin is to form a coating on the glass surface that can carry the image, and then after being treated with silver nitrate for photosensitivity, it can be used to shoot negative film.

The photo paper I made with egg white and salt is also to make a layer of halogenated protein coating on the surface of the paper. Although it is different from gelatin, it is actually the same thing. After drying and then being treated with silver nitrate for photosensitivity, it becomes a photo that can be developed.

In fact, to put it bluntly, you can use this kind of photo paper directly as a negative film, or you can use the previous method to take a one-time photo. After it is processed It has the same function as your silver plate.

However, your silver plate leaves the image inside the base material of the negative, that is, the image penetrates the entire silver layer, but my photo paper is different. The image displayed by the albumen photo paper only exists in the coating on the surface of the paper and does not penetrate the paper base. Compared with

your silver plate, this kind of photo paper has advantages and disadvantages. The advantage is that it is low in cost, and the image is clear and can be copied in large quantities, but the disadvantage is that the storage time is not as long as your silver plate. The only advantage of your silver plate is that it has a long storage time. It has no other advantages compared with photo paper. "

Luo Chong explained the principle to them and analyzed the advantages and disadvantages of the two technologies.

But Tang Yao, who was standing by, got nervous after hearing this. She quickly asked, "Then Chief Han, you said that this kind of photographic paper doesn't last long. It won't go bad in a few months, right?"

"That won't happen. Paper-based photos are mainly afraid of air oxidation causing the paper base to decay. Secondly, strong light will cause the protein coating to turn yellow and fade. If the photos are framed with glass to isolate the air and then placed indoors to avoid strong light, it will be fine to store them for a hundred or eighty years. At most, the photos will turn yellow after a few decades."

"So that's the case. That's not a short time. I thought it would go bad in just a few months, so I can't take it back to show my aunt." Tang Yao said with relief after listening to Luo Chong's explanation.

"Yes, Chief, a few decades is really not a short time. The key is that it is cheap, and it can be copied and enlarged at will. Whether in terms of cost or function, it is better than silver plate photos. This is the technology suitable for large-scale promotion." Ao Fei, who was standing by, also said with emotion.

"That's right. This kind of photographic paper only needs eggs, salt and white paper. These are things that every household in our Han tribe has. Who doesn't have a few hens at home? The cost of eating one less egg can take a few photos that can be preserved for a hundred years. This is definitely a photo that every household can afford." Qubing also said admiringly.

He invented the photography technology himself, so he naturally wanted to share it with his family and take some photos for them. However, the cost of silver plate photos is really high. Let's not talk about whether he can afford silver plate photos with his salary. The key is that such silver plates need to be customized by the research institute. Will such a high-end unit as the research institute make a few negatives for his family?

This is obviously impossible, but if this kind of albumen photo paper is used, there will be no worries at all. As long as there is potion, he can buy all the materials at home and make it himself.

"Husband, how are you going to promote this photography? Do you want to open some stores that provide photography for people or specialize in producing cameras and photo paper for sale?" Xiaodie also asked at the side at this time.

"Why, what do you think?" Luo Chong looked at her and asked with a smile.

"What ideas could I have? I'm just asking casually." Xiaodie spread her hands. Based on her understanding of Luo Chong, he would definitely keep a set of photography equipment at home. It was clear from the way he transformed this darkroom. So she didn't even think about opening a photo studio. As long as she could take pictures of the ones at home, it would be fine. As the legitimate wife of the leader, she would not take pictures of the people herself.

Luo Chong thought for a moment, then said, "Cameras are not difficult to make, but enlargers are not affordable for everyone. So if we want to promote it, we should produce equipment and sell it. However, we must first meet the office needs of the government, and then promote it to the public.

The first stage is to promote cameras, enlargers and other processing equipment to every county-level city, and then to the military of each garrison. Each garrison must be equipped with at least five cameras and an enlargement and processing equipment. For the time being, only we can make negatives and photo paper, so we will make them uniformly, and then fix the packaging, and distribute or sell them according to the number of boxes.

In the second stage, after these equipment are popularized in various cities, Takeshima will also be included in our jurisdiction. At that time, I plan to implement a new ID card system. As a supplementary document to the household registration booklet, everyone must order an ID card with a head portrait from the government. It must show age information, place of origin, title, name, gender, and information, and it must also have an anti-counterfeiting mark."

"Everyone makes an ID card with a photo?!" Tang Yao said in surprise.

"That's not the case. We also need to set a standard for this. How about this? Taking adulthood as the standard, adults must apply for ID cards with their household registration books at their place of household registration, while minors only need to apply for household registration." Luo Chong thought for a while and said.

ID cards with photos are of great benefit to the management of the country. First of all, it is a matter of public security. As long as the person does not match the photo on the ID card, he cannot use someone else's household registration book to do bad things, or use someone else's household registration book to claim the preferential policies given by the tribe and become a pest in the tribe.

Such things have really happened. After being reported by the victim and tried by the county magistrate, the case file was sent to Luo Chong, and he knew about it.

The emergence of photo ID cards can solve this problem to a large extent, and it is also more convenient for the tribe to control. In this way, when banks start to implement personal savings and remittance business in the future, and when selling tickets and boat tickets after the train is opened, ID cards can play a huge role.

After roughly sorting out the idea of ​​promoting photography, several people began to develop photos again, transferring all the photos taken during the day to photo paper using an enlarger, and some photos were even copied many times.

Looking at such convenient and cheap photos, Qubing also asked Luo Chong if he could borrow his camera. He wanted to take some photos of his family tomorrow, and he was willing to pay for the consumed film and photo paper.

Although the boy had no money, he agreed to let Luo Chong deduct the money directly from his salary.

Luo Chong would not give him this opportunity, and he confronted him on the spot.

"You came to me to ask for a job, and I arranged a job for you, but you have only been in office for less than a month, and look at what you have done. I asked you to develop bullets, and you made me a camera. Now the equipment for making shells has been sent to the Industrial County, and you still tell me that you want to continue playing with cameras? Do you think I am too lenient with you?

Look at the other guards, who dares to be so presumptuous to you? If you don't do your job well, I will take a picture of you." Luo Chong poked Qubing's forehead and said.

Qubing stretched out his hand to block it, still muttering in a low voice, "You were not like this before. You have become more stingy after having a child. If you don't want to lend it, then don't lend it. You still find so many excuses, hum."

Snap————

Luo Chong slapped him on the back of the head and scolded, "You dare to talk back, you are disrespectful, you have grown up, right? I punish you to stand guard at the city gate tonight."

Qubing didn't dare to mutter anymore, otherwise he didn't know how the leader would punish him. He held his mouth and went out directly with grievance.

Xiaodie, Zhan Ying and Tang Yao on the side couldn't help laughing at his childish side.

"Husband, he is going to get married, and you still treat him as a child." Zhan Ying said with a smile.

"He is a child. Look at him like that, does he look like an adult?" Luo Chong said with some dissatisfaction.

"Then he just wants to take a photo of his family, look at you" Xiaodie also helped.

"Of course there's nothing wrong with taking photos, but he shouldn't have mentioned it to me at this time. He could have waited until the holidays. He can't tell the difference between the important and the unimportant. This kid is still too young and too playful. He needs to be taught a lesson, otherwise he won't be able to achieve anything in the future. As for the photos, go to his house tomorrow and take a few more photos for his family. Don't tell him yet. I want to leave this kid alone for a few days." Luo Chong immediately arranged.

"You, you have a sharp tongue but a soft heart." Xiaodie poked Luo Chong's lips in dissatisfaction and complained.

The next morning, Qu Bing, who had been standing guard at the city gate all night, ran to the door of Luo Chong's house early to wait for him to go out. He didn't even have breakfast. He looked listless and his clothes were wet by the morning dew.

Luo Chong glanced at him when he went out, but he ignored him and went straight to the air force camp where the ammunition production equipment was placed with his personal guards.

Qubing pouted again, holding the saber at his waist and hurried to catch up, but just as he was about to run, a girl of about his age suddenly jumped out from Luo Chong's house. The girl was wearing a white dress, and she didn't look like a maid in Luo Chong's house. Qubing had never seen this person before.

But the girl ran straight to him, her face flushed with shyness, and stuffed a lotus leaf bag in her hand into Qubing's hand.

"You haven't eaten yet, don't talk back to the leader anymore. Here, this is for you."

After the girl finished speaking, she turned around and ran back to the yard without waiting for Qubing's reaction.

Qubing opened the food wrapped in lotus leaves, and inside were three thick meat buns, with bright red and fragrant braised pork, cut in half braised eggs, and knotted braised tofu skin, all sandwiched in the middle of thick bread, and embellished with coriander and green peppers.

He immediately drooled, his stomach growling with hunger, as if clamoring for food, but his brain was frozen on the spot.

Who is she? Why did she bring me food? Why is she here?

That woman is so beautiful! ! ! !

No, why am I still here?

Oops? I'm going to be punished for not keeping up with the leader.

I've updated two chapters with 6,000 words. I'm not in a good state today. My eyes are uncomfortable. I'll try to write another chapter.

(End of this chapter)