"Flammable mixed fluids."

"When the bottle shatters, it ignites and produces a flame with strong adhesion."

Unlike the stunned Hutos Oiler, the iron idiot Vormish standing in the rear is obviously more calm.

There is even a summary of the effect of the Molotov cocktail.

Chen Xuan turned his head to look at him, and Vormish grinned, pulling the scar on his face, revealing an ugly smile.

I have to say that this guy summed it up very well.

Since both gasoline and alcohol-based fuels are volatile, the relatively sealed bottle is filled with flammable gases when fully blended.

However, when the incendiary flask is ignited and thrown to shatter, the flammable gas in the near-compressed environment will deflagrate, which will quickly ignite the oil that is scattered around the landing point.

That's why he didn't fill the entire bottle with oil.

The brilliant flames burned on the metal target for several minutes before dissipating.

The area of effect of the flames is almost five or six meters in radius.

Hutos Oil Machine couldn't wait to run to the shooting range with several alchemists in the alchemy.

In fact, this guy is a multi-disciplinary scholar of alchemy himself.

Major sub-disciplines including mechanical engineering, materials alchemy, and pharmacy are all involved, and all of them have obtained Kingdom certification titles.

After studying for a long time, it returned to Chen Xuan's side with a thoughtful face.

The alchemists gathered together and whispered a discussion.

"The oil you prepared is special."

"Its combustion characteristics are stable, unlike most of the flammable gases known to Naroya."

"Chen... Suspend... Mr. Xuan, can you tell me the origin of these oils? ”

Hutos Oiler was quick to draw conclusions.

It said Chen Xuan's name a little awkwardly, and was very curious about the origin of the oil used to make the Molotov cocktail.

In fact, there are many kinds of oil that can be ignited on the continent of Naloa.

But there are very few that have deflagration properties.

Usually alchemists like to add magical materials to achieve the desired effect.

For example, the main materials of the Molotov cocktail target "Flame Jar" are the powder of the fire elemental gem and the grease of the fire type demonic beast, which can detonate the flame burn as long as the magic element is input to activate.

In terms of combustion effect alone, it is better than incendiary flasks, but the cost is very high.

Although the powder of elemental gems is leftovers, the quantity is not large.

And the subcutaneous grease of a fire civet beast can only make about eight or nine flame jars.

Not to mention that there is a risk of overturning during production, and if you are not careful, the two burst fire-based materials will ignite and cause accidents.

On the other hand, the Molotov cocktail brought by Chen Xuan is not only simple to mix, but also has low risks in the production process.

Therefore, Hutos Oil Engine is not interested in the process, but more interested in the oil mixing itself.

Flammable oils and greases are plentiful in both Naroa and Bluestar.

The most typical example is vegetable oil.

The edible oil that is essential in the Blue Star family is also a fleasy fuel fluid.

It's just that most edible oils have a ignition point of more than 200 degrees Celsius before they ignite an open flame.

When it is used as fuel for oil lamps, it is easier to burn it locally.

And like solid edible oils, such as animal fat, they also have similar characteristics, and after entering the melting and boiling point, they will produce pyrolysis and combustion effects.

Therefore, fleasy fuel fluids are not a rare thing.

At this point, a concept that often appears in hazardous chemicals is involved:

Flash point, ignition point, spontaneous ignition point.

Liquids like gasoline are known to volatilize, and the higher the temperature, the faster the evaporation.

When the volatile octane and alkene naphthenic vapor is mixed with air, it can flash a spark when it comes into contact with the ignition source, but it is extinguished in a flash and cannot continue to burn, this phenomenon is called flash ignition.

Under the condition of room temperature of 28°C and relative humidity of 85%, the volatilization rate of gasoline is 55% after 20 minutes.

The volatilization of 1 kilogram of gasoline at room temperature can produce about 400 liters of gasoline vapor.

When the gasoline vapor is mixed evenly with the air, it burns extremely quickly and completely.

The second is the concept of ignition.

Combustible substances, whether solid, liquid or gaseous, coexist with air, and when they reach a certain temperature, they will burn in contact with the ignition source, and continue to burn after the ignition source is removed.

At this time, the lowest temperature of the combustible substance is called the ignition point, also known as the ignition point.

A key difference between a flash point and a flash point is whether the spark can continue to burn after it has been removed.

According to the definition of flash point and flash point, the flash point is higher than the flash point for flammable liquids.

Finally, there is the spontaneous ignition point.

At the auto-ignition temperature, the combustible substance comes into contact with the air and does not require an open flame to combust.

The spontaneous ignition point of gasoline is 427°C at normal atmospheric pressure, but in the environment of compressed air, its spontaneous ignition point can be greatly reduced.

It is the difference in the three characteristics of flash point, ignition point and spontaneous ignition point that is the biggest difference between gasoline and alcohol-based fuels and the common oils in the Naroa continent!

Hutos Oiler also saw through this, and turned his attention to the oil itself.

Facing its questioning, Chen Xuan smiled and said nothing.

"Mr. Hutos, this is a real secret."

"And I'm not here to discuss material alchemy with you."

"I just want the alchemy workshop to help with the processing."

"The Molotov cocktails produced will be used to resist the Scourge."

Hearing his words, Hutos smiled, realizing that he was abrupt.

No kind of mysterious material will be easily revealed.

For example, the continent of Naroa is extremely vast, and there are some special materials in various places, which will never be leaked as patents.

In its view, these flammable materials that can be used to make incendiary bottles must also have some kind of process and raw material site that needs to be kept secret.

It would never have been imagined that these materials were all common fuels in another world.

Seeing the change in Hutos's expression, Chen Xuan could roughly guess what this guy was thinking.

Just as it was about to open its mouth to answer, Chen Xuan suddenly changed his words.

"However, this matter is not completely non-negotiable."

"Oh? You can ask for anything. ”

"Whether you want krona, alchemy materials or potions, as long as you open your mouth, everything is easy to discuss!"

Hutos Oil Machine rubbed his hands together and said with a look of anticipation.

Talking about business is one of its best areas.

As long as the other party relaxes, then there is hope for a negotiation.

saw Chen Xuan grinning.

"My conditions are simple,"

"As long as you and all the alchemists in the alchemy workshop with the titles of third-level mechanical engineering, material alchemy, and pharmacy conclude a limited-time slave contract with me, then I will tell you all the origin of these oils."

Chen Xuan used greed as a line and oil as bait, sitting upright by the river, fishing these alchemists.

This condition made Huttoston stunned.

"Slave... Slave Contract..."

Its sensitive and suspicious nature makes it think that this matter is not simple.

"It's for a limited time!"

Chen Xuan took the initiative to add.

At this time, Hutos Youji looked at the backbones of the alchemy workshop behind him, bowed slightly, and replied in a hesitant tone: "Please wait, I need to discuss it with my guys!" ”

After speaking, they trotted together, and discussed "muttering" in each other's ears.

And when Chen Xuan finished saying the limited-time contract, the embarrassment on Jensen Iron Furnace's face flashed away, and the iron idiot Vormish turned around and looked at the chariot not far away, his expression focused and serious, as if he didn't care about Chen Xuan's request to the goblins.

A few minutes later, Hutos Oiler returned to Chen Xuan.

"As you said, it's not impossible to conclude a time-limited slave contract."

"But the terms of the contract have to be drawn up and initiated by us."

"And the contract can only last for a maximum of one Naroa Day!"

Hutos's tone was very resolute, his eyes were spinning non-stop, the speed of his eye movements was directly proportional to the speed of thinking, and he didn't know how many thoughts he had turned when he said two words.

"Yes."

Chen Xuan readily agreed.

The time-limited was meant to be a cover.

Besides, with the current demon plague in Magtan City, no one is sure if they will be able to survive until the next Naroa Day.

has been bargaining at this juncture, not only can he not hide his true intentions, but he also has a feeling of wanting to cover up and take off his pants and fart.

So Chen Xuan agreed very happily.

Soon, at the urging of Hutos, a goblin engineer named Quentin Flowerskin reluctantly stepped out first and sent Chen Xuan an invitation to sign a contract.

Hutos was also strangely cautious, knowing to let the guys test the water first to see if the contract was boring.

As everyone knows, Chen Xuan's contract modification can only take effect after [cross-border], how can it be so easy to be exposed.

The contract appeared in the minds of both parties, and his consciousness quickly decoded all the terms.

No loopholes have been found that could force the termination of the contractual relationship.

It's just that the other party has set the restrictions on both parties in the slave contract extremely strictly.

As the master, Chen Xuan not only cannot force orders, but the goblins also have the right to refuse to answer questions.

There are also a series of additional notes.

This makes the so-called slave contract exist in name only, and is essentially closer to a cooperative contract.

But it doesn't matter, Goldfinger will make a move, and the goblins' clever behavior is difficult to change the fate of being adopted by Chen Xuan in the end.

After choosing to conclude the contract and leaving a soul imprint, the master-servant contract between the two parties is established.

Seeing that the process of signing the contract was going well, Hutos Oiler finally let down his guard.

It took the other alchemists to accept Chen Xuan's contract one after another.

In this way, the alchemy workshop of Magtan City was taken under his command.

Without being busy [cross-border], Chen Xuan introduced to Hutos the origin of gasoline and alcohol-based fuels, as well as the introduction of fossil fuels such as petroleum.

Since the conversation was confidential, Chen Xuan and the goblins went to the office to talk.

When he finished speaking, these alchemists with high-ranking titles fell silent.

But the silence didn't last long.

An Earth Refiner sitting next to him suddenly raised his hand, and Chen Xuan nodded, signaling that it could speak.

"According to the description, this oil statue does not look like the slurry recorded in the Naroa Naturalist?"

"Rumor has it that there are several lakes of magma in the wild basin where the trolls live."

"The slurry is so viscous that it can't be ignited directly, but flammable gases often float on the surface of the lake."

"One of the magma lakes was ignited on a large scale in more than 200 Naroa years, and the flame has not been extinguished until now."

Its words quickly drew a response from the other goblins.

Even Chen Xuan narrowed his eyes.

Judging by the description of this georefining alchemist, the magma is really a bit like oil.

And the place where it appears is a basin, which is also in line with the oil-rich topography.

In the Blue Star, most of the oil-rich areas are mostly sedimentary terrains, such as plains and basins.

The desert basins of the Middle East's big dogs can even spill oil from the cracks in the ground.

In addition to the fact that the continent is full of magic, there are many things that blue stars have in common in terms of environmental specifics, and it is not too surprising that oil resources will be born.

"Okay, let's leave the topic of oil out of the way."

"The most important thing right now is to manufacture Molotov cocktails."

"I've just talked about the manufacturing process and fuel ratio."

"I need at least 3,500 Molotov cocktails in seven hours."

"As long as I can survive the demonic disaster, I will find a way to get some crude oil and its derivatives for you to study."

Chen Xuan raised his hand and gently tapped on the tabletop.

All the goblins stood up and saluted.

Although the contract has not yet been amended, the relationship between the two parties has been determined.

Then the goblins followed Chen Xuan out of the office.

Once inside, he removed gasoline and alcohol-based fuel, as well as thousands of beer bottles, from the storage compartment.

As for the strips of cloth, let the goblins figure out how to raise them themselves.

The agreed foundry fee is 3 crowns per incendiary bottle, and the total agreed price is 10,500 crowns.

Slaves to slaves, business to business.

The Alchemy Workshop will gather all the alchemy apprentices in the city and assign at least half of the workers to pack Molotov cocktails.

Chen Xuan finalized this matter, and his heart suddenly settled down a lot.

By the time he finished talking to the goblins, it was already half an hour later.

Surprisingly, the iron idiot Vormish did not leave.

Instead, Jason Ironforge returned to the Guild with the blacksmith apprentices and the Magic Transporter.

When Chen Xuan walked out, Vomish took the initiative to walk towards him.

"Let's make a deal."

"Give me one of these vehicles."

"Whatever you want."

"I know you have a whole new level of materials and mechanical engineering technology."

"By the way, can I touch it?"

Ironclad Vormish said in a calm tone, his hoarse voice making him even deeper.

And this guy has been watching it for so long, he hasn't touched it with his own hands, and he has to ask the owner's consent before touching it, and I don't know whether to call him dull or to say that he is obedient.

Chen Xuan nodded and motioned for him to please.

I saw that the iron idiot Womi Stone stretched out his alienated huge palm and gently stuck to the side of the tank.

A red light bloomed from the palm of his hand, covering the entire tank in an instant.

At the same time, a flash of realization flashed in his eyes.

The blood-colored light immediately converged, and his expression became inexplicably complicated!

……

(End of chapter)