Chapter 502: camera

The best photosensitive material is silver bromide. Preparation of silver bromide. Sodium bromide is more common than potassium bromide. Sodium bromide and silver nitrate react to produce silver bromide. All this must be done in the darkroom. But Shangwen covered it with a large blanket. Then take the lampshade made of red paper and cover it on the kerosene lamp. Because of the kerosene lamp. Shang Wen had to come out to take a breath. Or put it up with a bracket.

There is silver bromide. The photographic gelatin barely had it. Because gelatin needs fresh beef bones to be made after ninety to one hundred days. But things have come to this point and can only be used reluctantly.

The next step is to make a camera. Make a portable wooden box camera according to the native method. Shangwen needs to make two. Take pictures one by one. The shutter also uses a mechanical shutter.

Follow Shangwen's immediately. The camera must also have a focal length. In order to measure. Shangwen spent a lot of thought. With the help of triangulation. Calculate the distance of the third point based on the distance between two known points. This method has been widely used in artillery and architecture. Based on this, some people began to give birth to geometry. Many people are studying. Because the area involved is very extensive. That's what Shang Wen did. He has to calculate the appropriate distance based on the triangulation method. Cameras of later generations are equipped with this kind of distance measuring device.

There is also a rotatable mirror. The whole camera is made of two wooden boxes. In this way, the focus can be adjusted.

Shang Wen made a dual-lens reflex camera. This time spanned the history of the camera several times. But Shang Wen is still satisfied. There is also a flash. The early flash lamps were all spotlights. Shang Wen uses tin foil to make an umbrella shape. Then electrolyze magnesium.

Magnesium has been recognized in Qin's laboratory. Mainly produced by electrolytic lime. The point solution method also produced active metals such as sodium and potassium. Makes Qin's chemical process once again advanced. These are all the credit of Bai Ai. Continuous research and development experiments based on a booklet of limited knowledge.

The use of electrolysis has also discovered a poisonous gas. Chlorine. At the same time, another hydrochloric acid was obtained. This is all made by electrolysis of salt water. As for efficacy. The laboratory personnel are still studying.

Chemistry has been recognized by more and more people. Some arsenals began to specifically link chemical and weapon manufacturing. Mainly used as gun propellant. But progress is very slow. Shangwen remembers that a gunpowder maker found smokeless gunpowder but because the fiber material used was catkins. Catkins is currently the best fiber material Qin has found. It is used in many places. Such as papermaking. Banknotes and checks require a lot of catkins to make high-end paper. This pushed up the price of catkins. Use catkins to make smokeless gunpowder propellant. It seems a bit extravagant. due to this reason. Makes Qin Guo deviated on the propellant. They turned to research other alternative propellants. Because of the smokeless gunpowder. machine gun. And the development of other types of bullets has been slow.

But if there is a loss, there must be a gain. Researchers invented another propellant. Bitter taste sour. But he is mainly used on artillery shells. This allowed Qin to make large-scale advances in artillery technology. Some people started to make artillery with post-loading based on the pressure cooker. Metal medicine barrels are also used for medicine packs. The appearance of the detonator. Let a kind of expensive single-base charge shells appear. But there was a problem with the barrel. Because the artillery still uses bronze or copper as the launch tube. The demand for steel is brought up again. People have reached an urgent need for steel.

Steel needs to be forged repeatedly to come out. This has led some people to find new ways to make steel. However, this time it depends on chemistry. Because chemistry uses a series of chemical agents to measure its composition. And to prepare a foundation for mining minerals.

Shangwen's camera has done almost the same. The rest is photo paper. See if it's five o'clock. Shangwen decided to take a break. But Yingyu couldn't fall asleep with excitement. Because of sunglasses. Lots of sunglasses. She wants to give it a try.

With this idea. She turned left and couldn't fall asleep. Turn right and can't fall asleep.

"Why the sky is not bright yet. My sunglasses!" Yingyu took the sunglasses and put them on.

"No. I have to get up." Yingyu immediately turned over. The maids she had tossed about had to be busy too. Yingyu was extremely excited. She kept urging to hurry up.

When it's almost finished. He put on a big brown toad mirror and walked out the door early.

Just went out. Seeing Yingyu's attendants was shocked.

"Ah" Many attendants knocked the guy in their hands to the ground.

"What's your name. Haven't you seen this princess wear sunglasses? Humph!" Yingyu planned to appear in a brand new posture. Unexpectedly, someone did not understand. This is really disappointing.

King Qin got up early, and Zhao Gao followed King Qin after serving Queen Qin. There are very few documents approved by King Qin himself. Therefore, the more free time Qin Wang has daily.

"Zhao Gao, is today's newspaper here?" Qin Wang asked.

"The small one is going to get it." Zhao Gao bowed respectfully and prepared to leave. When he was about to turn, Yingyu suddenly appeared wearing sunglasses.

I have never seen Zhao Gao who dressed up like this be frightened to the ground.

"This..." Zhao Gao said nothing.

"Hey. Get a shock! These are sunglasses!" Yingyu said.

"Get up!" Yingyu said.

"What are you doing wearing a mask?" Wang Qin asked, turning his head attracted by Zhao Gao's voice.

"Father! This is not a mask. This is sunglasses. It blocks the sun." Yingyu stepped forward and took off the sunglasses and handed it to King Qin.

"Oh! Mr. Qin did it for you, right?" King Qin asked.

Yingyu nodded and agreed.

King Qin put on his sunglasses and took a look.

"Hey! Why is it dark this day. Doesn't it make you invisible after wearing it?" King Qin asked strangely.

"This can only be used after the sun comes out. When the sun comes out, there is no need to dazzle." Yingyu explained.

"Yeah." King Qin wanted to give it a try. But the sun has not risen yet in the morning. Sunglasses are not very useful.

"Tell me, what else did Mr. Qin invent?" King Qin asked, taking off his sunglasses.

"Father, how did you know that something new has been invented?" Yingyu asked.

"Look at you!" King Qin replied.

"Look at me." Yingyu was puzzled.

"You come so early, there must be other things. Let's talk!" King Qin said.

"Yeah." Yingyu was still puzzled. But the father's question had to be answered first.

"What kind of telegram is he studying. It's the one that can send the news all at once. And the camera. It's the thing that can draw the father and king all at once." Yingyu replied truthfully.

"Oh! The widow is going to have a look." King Qin said.

"Zhao Gao, prepare a car!" King Qin called out loudly.