My Post-Apocalyptic Shelter Levels Up Infinitely!

　　【Saltpeter (Excellent)】

Description: The high-purity saltpeter purified by the entry-level craftsman "Suma" has a wide range of functions. It can be used to make matches, pyrotechnic powder, black powder, glass and food preservatives, etc., because of inexplicable reasons, the grade is Upgraded to a sophisticated level.

　　Special ability: make nitric acid (concentration (95%↑)

　　 made into gunpowder (energy +50%)

　　 made into fertilizer (fertility +25%)

　　...

　　 Evaluation: There are many uses, a wide range, and quick results! Just hang up? (Righteous words!)

　　 The property page that popped up from the system was refreshed by the special ability of Saltpeter for the first time.

　　 has more than 30 uses in various aspects, all of which have been strengthened to a certain extent.

　　 But this is not what surprised Somo the most.

　　 "It turns out that the Nether Energy Water mixed with these things will produce so many changes?"

　　 fiddling with the saltpeter in the beaker in surprise, Somo still couldn't see how this thing had so many characteristics.

"but..."

　　 "If the system is so powerful, I'm afraid my technology tree will skyrocket!"

　　 Staring at the saltpetre powder with scorching eyes, Somo's thoughts have drifted to the oil machine well in Refuge No. 2.

　　Originally, after this wave of purified saltpeter and sulfur, mixed with charcoal, the famous black powder can be produced directly into the age of firearms.

　　 But now, an abrupt term popped up in Somo's mind-

　　 "Bitter taste sour!"

　　 As the famous "Yellow Explosive" (TNP), it is also called "Piric Acid Explosive".

　　Its ingredient is "trinitrophenol", which is often confused with Nobel's "safe explosive", "TNT".

　　 In 1771, the British Peter Wolfe synthesized a dye.

He mixed concentrated sulfuric acid, nitric acid and phenol (maybe refined from coal tar crude phenol or indigo, people didn’t know phenol at the time) to obtain a bright yellow crystalline powder with a strong bitter taste. Given the name "picric acid".

　　 People at that time just dyed clothes and made paint with bitter acid.

　　 In the dye industry at that time, the name of trinitrophenol was often "yellow". People have dyed fabrics with a bitter taste for 100 years, but they never thought about how to blow it up.

In 1871, the guys in a dye shop in Paris, France encountered a problem. There was a backlog of yellow dye tanks that seemed to be rusted to death and couldn’t be unscrewed anyway. So the desperate guys decided to open the tank in the simplest and rude way— —Smash!

　　 And the hammersmith I found was a big hammer for 80 yuan.

　　 This time, the hammersmith Mou had enough strength to go down with a hammer!

　　 Unexpectedly, the jar exploded with a "boom", and the entire dyeing workshop suddenly took a plane, leaving only a group of colorful survivors moaning in the ruins.

　　 After many investigations, people ruled out the unidentified explosives hidden in the jar, and locked the problem to the picric sour jar. People suddenly realized that--

　　 "The yellow paint was detonated by a hammer!!!"

　　 This incident caused a sensation in society, and people were worried about the "yellow color".

　　 But the French military at the time was bright. It was clearly the best military weapon sent from the sky. The "yellow color" proved its safety in long-term use, and it can also be easily prepared on a large scale.

　　 Then the French "Eugene Turpin" took the lead in developing the "picric acid press-in method" of artillery shells, and also gave it the name "melinite", that is, "melinite".

The term 　　 is unfamiliar to many people, but when it comes to the 1897 75mm field gun, everyone is familiar with it, which is Li Yunlong’s "Italian gun"

　　 Now there is saltpeter to make nitric acid, and sulfur and saltpeter can react to form sulfuric acid, and then some petroleum can be used to extract the toluene inside...

　　 "If it is really possible, I am afraid that my bomb technology tree will directly go beyond the black powder and nitro collodion, and directly come to the era of yellow explosives!"

　　Thinking about the explosive configuration methods that the old man had been talking about before coming, Somo was instantly excited.

　　 Black gunpowder is only a propellant. When made into a gunpowder bag, it can only complete the two processes of deflagration and ignition.

　　 Picric acid is different. Once a shock wave with a chemical reaction is detonated, an explosive reaction occurs first at the point of initiation to generate a large amount of high temperature, high pressure and high speed airflow, which excites the shock wave in the explosive.

　　 The shock wave strongly compresses the adjacent thin layer of explosive to cause the explosive reaction, which generates a large amount of gas and a large amount of heat, and completes the detonation-detonation-wave process.

　　 Even if it can accumulate enough bitter sour, it can be made into explosive packs and thrown into the kobold castle.

　　 Under the detonation wave, as long as one back and forth, you can let the kobolds know what justice is from heaven!

　　 "I will try to repair the oil well tomorrow!"

　　 In front of the workbench, Somo stood up and sat down again and again, his heart agitated hard to calm down.

　　 Pour the purified 500g saltpeter powder into a wooden container and put it in the second bedroom. Somo returned to the workbench again.

　　 "I know the equation for purifying yellow explosives. I have learned the methods of preparing nitric acid and sulfuric acid in high school. These are not problems. The key lies in the extraction of toluene in petroleum and the process of mixing reaction to produce picric acid.."

"In the past, Nobel made explosives and killed his brother. Although this picric acid is not as difficult as nitroglycerin, it may explode when it encounters high temperature, friction, or impact. Moreover, it reacts with iron and acts like thunder. Acid mercury generates mercury salt like picric acid metal salt, causing accidental explosion hazard.”

　　 "Maybe I can get the preparation method of picric acid through trading information...I will get a better and safer method through system upgrades!"

　　 Having figured this out, Somo didn't hesitate, and directly called out the game panel to find the contact person.

　　 swept through all the friends list, and finally Somo set his eyes on the line marked Shen Ke.

　　 Concentrate and open the chat panel.

　　【Suma: Hello Shen Ke, do you have time to talk, I want to make a deal! 】

　　 After the message passed, Somo continued to sit in front of the workbench and waited quietly.

　　 Sure enough, less than five seconds later, the video of the opposite Shen Ke bounced over.

　　 After switching on the video, the screen sizzled, and Shen Ke's slightly tired face appeared on the screen.

　　 "Wow, Mr. Somo, your refuge is developing so fast, it doesn't look like wasteland at all, but a bit like a brick house in my hometown!"

　　Bright lights.

　　 Clean and tidy partitions.

　　 In the distance of the camera, sparks and Oreos are still frolicking on the ground.

　　 is looking at myself.

　　The dilapidated wooden house, with a homemade thick smoke torch, was completely dark through the window.

　　 There is a headwind from time to time, blowing black smoke into the room, causing people to cough.

　　 "Where and where, I was lucky, and I made some achievements, which is not worth mentioning compared to you" waved his hand, Somo quickly ended the polite time and went straight to the subject.

　　 "I want to make a deal with you. Yellow explosives, you know, are bitter and sour. I think someone from you will know the formula and preparation method, right?"

　　 "I know, this is not a problem. If the raw materials are not enough, we have all made them. Are there raw materials near you?" Shen Ke said without thinking about it.

　　 After all, this thing is not difficult. Compared with the tnt and black gold or cloud explosive bombs, yellow explosives are basically not difficult as long as they have raw materials.

　　 But what is missing is the raw material!

　　 Ancient China failed to develop explosives. The reason was that it was difficult to extract oil.

　　 Oil is not found in all places. As a top-level strategic material, Shen Ke's refuge is obviously not explored.

　　 "Ahem, this raw material, I got it out of the treasure chest. I just want to make some explosives for self-defense when I have a little storage."

　　 Sumo didn't change his face, he opened his eyes and talked nonsense.

　　 But there is no need to explain too much, everyone is just trading, so stop.

　　 The opposite Shen Ke nodded: "Then what about the trading items this time? Is it still Nether Energy Water?"

　　 "No, this time I will exchange information with you. There is information about alien creatures!" Somo smiled confidently and waved his hand.

　　 "This...I'm afraid I can't be the lord, I need to ask for instructions." Shen Ke was embarrassed, and after receiving Somo's answer, he hung up the phone.

　　 After a while, when the call was connected again, two middle-aged men with majestic expressions were already sitting opposite, and four recorders were sitting behind the man, looking nervously at the camera.

　　 "Hello, Somo, we have passed your transaction. You can just tell us the information of alien creatures. Whether we know it or not, we will give you a complete formula and preparation method at the time."

　　 nodded, Somo was not afraid to run across the road, and straightforwardly told the warrior kobold, the warlock kobold, and the white-robed kobold who hadn't figured it out.

　　 In the process, Somo concealed some details of the battle, only telling the magical method of the warlock kobold, and the combat effectiveness of the warrior kobold, as well as information such as the kobold carrying supplies when he arrives.

　　 The four recorders struggled to write, and Somo could observe from the video that as more and more information flowed out, the shock on their faces.

　　 Even the serious middle-aged man sitting on the left asked several details repeatedly in the process.

　　 "Okay, Somo, thank you for your contribution to mankind~www.readwn.com~ Your information is very useful. This information will be gradually spread out in Huaxia Refuge. Do you have no opinion on this?"

　　 "No no..." After speaking, several people hurriedly stood up, and Shen Ke sat back again.

　　 While the other side was preparing for bitterness and sourness, the two also began to chat with each other.

　　 "By the way, Shen Ke, what identity is the one sitting on the right just now, it feels a little weird" After several waves of topics changed, Somo turned around and asked the doubts just now.

　　 The man on the left was vigorous and sturdy, sitting upright, the man on the right was still a little at first, and sat loosely after a few minutes.

　　 "The biggest suspicious point is that when I talked about Kobold intelligence, although he looked shocked, in fact, his micro-expression seemed to be something he already knew..."

"Oh? You said President Ying? Ying Tianlong is the president of the Civil Self-Help Association. Their family is relatively large. When they came here, more than 20 people were put together. They are currently in our "tundra" refuge. The main force!" Shen Ke said with a faint smile, without covering up.

　　 "The tundra?"

"Well! This is the name of our refuge. Of course, if we can get No. 1 in disaster resistance next time, we will still use the name Huaxia. This title is only the No. 1 refuge can be used, and we all use Tundra at other times. For the title..."

　　 "That's it..." After receiving the news he wanted, Somo immediately changed the subject and talked about some aspects of life.

　　 After a while, Shen Ke's trade request bounced over.

　　 Looking at the flow chart of the yellow dynamite in the transaction item, Sumo smiled under the light.

　　 There was a flash of light, and two papers filled with text appeared at the work desk!