I have a magical world

"Flammable oil mixture."

"After the bottle is broken, it will explode and produce a flame with strong adhesion."

Unlike the stunned Hutos Youji, the iron-headed Warmish standing at the back was obviously more calm.

There is even a summary of the effects of Molotov cocktails.

Chen Xuan turned his head and glanced at him. Warmish grinned, pulled the scars on his face, and showed an ugly smile.

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

Since both gasoline and alcohol-based fuels are volatile, after thorough mixing, the relatively sealed bottle will be filled with flammable gases.

However, after the incendiary bottle is ignited and thrown to pieces, the flammable gas in a compressed environment will deflagrate, quickly igniting the oil scattered around the impact point.

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

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

The area of ​​influence of the flame is approximately five to six meters in radius.

Hutos Youji couldn't wait to lead several alchemists in the alchemy workshop to the shooting range.

In fact, this guy himself is a scholar of many materials in alchemy.

Major branch disciplines including mechanical engineering, materials alchemy and pharmacy are all involved, and all have obtained professional titles certified by the Kingdom.

After studying for a long time, it returned to Chen Xuan with a thoughtful expression on its face.

The alchemists gathered together and discussed quietly.

“These oils you prepared are special.”

"Its combustion characteristics are stable, unlike most of the flammable fluids known from Naroa."

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

Hutos Oil Machine quickly came to a conclusion.

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

In fact, there are many kinds of oils that can be ignited in Naloa.

But there are only a few that have deflagration properties.

Often alchemists like to add magical ingredients to achieve desired effects.

For example, the main materials of the "flame jar" that the Molotov cocktail is aimed at are the powder of fire element gems and the grease of fire monsters. As long as the magic element is input and activated, the flames can be detonated.

In terms of combustion effect alone, it is better than a Molotov cocktail, but the cost is very high.

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

And the oil under the skin of a fire beast can only make about eight or nine flame jars.

Not to mention that there is a risk of overturning during production. If you are not careful, the two exploding fire-based materials will ignite prematurely and cause an accident.

On the other hand, the Molotov cocktails brought by Chen Xuan were not only simple to prepare, but the risks in the production process were also very low.

Therefore, Hutos Oil Machine is not interested in the process, but rather in the mixed oil itself.

Flammable oils and greases are plentiful on both Naloa and Blue Star.

The most typical example is vegetable oil.

The cooking oil that is a must-have in every Blue Star home is itself a flammable oil liquid.

However, the ignition point of most cooking oils must reach more than 200 degrees Celsius before they can ignite an open flame.

When used as fuel for oil lamps, it is easier to perform local combustion.

Solid cooking oils, such as animal fats, also have similar characteristics. They will produce pyrolysis and combustion effects after entering the melting and boiling point.

Therefore, flammable oil fluids are not actually a rare thing.

This time involves a concept that often appears in hazardous chemicals:

Flash point, fire point, autoignition point.

It is known that liquids like gasoline evaporate, and the higher the temperature, the faster they evaporate.

When the volatilized octane and olefin naphthenic vapors are mixed with air, sparks can flash out when exposed to a fire source, but they are extinguished and cannot continue to burn. This phenomenon is called flash combustion.

Under the conditions of indoor temperature 28°C and relative humidity 85%, the gasoline evaporation rate is 55% after 20 minutes.

At normal temperature, 1 kilogram of gasoline volatilizes to produce approximately 400 liters of gasoline vapor.

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

The second is the concept of Randian.

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

The lowest temperature of the combustible substance at this time is called the ignition point, also called the ignition point.

A key difference between fire point and flash point is whether combustion can continue after the spark is removed.

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

Finally, there is the spontaneous ignition point.

At the autoignition temperature, combustible substances come into contact with air and can burn without the action of an open flame.

Under normal atmospheric pressure, the auto-ignition point of gasoline is 427°C, but in a compressed air environment, its auto-ignition point can be greatly reduced.

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

Hutos Oil Machine 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 processing."

"The Molotov cocktails produced will be used to resist demonic disasters."

Hearing his words, Hutos smiled and understood that he was being abrupt.

The origin of any mysterious material will not be easily exposed.

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

In its opinion, these flammable fuels that can make Molotov cocktails must also have some kind of process and raw material location that needs to be kept secret.

You would never have imagined that these materials are common fuels in another world.

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

Just when it was about to answer, Chen Xuan suddenly changed the subject.

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

"Oh? You can put forward any conditions you have."

"Whether you want crowns, alchemy materials or potions, as long as you ask, everything will be easy to discuss!"

Hutos Youji rubbed his hands and expressed his expression expectantly.

Talking about business is one of its strongest areas.

As long as the other party relents, there is hope for negotiation.

But he saw Chen Xuan grinning.

"My terms are simple,"

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

Using greed as a thread and oil as bait, Chen Xuan sat by the river and fished for these goblin alchemists.

This condition made Hutos stunned for a moment.

"Slave...slave contract..."

His sensitive and suspicious nature makes him think that this matter is not simple.

"It's limited time!"

Chen Xuan took the initiative to add something.

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

After saying that, they all trotted together, whispering and discussing.

When Chen Xuan finished talking about the limited-time contract, the embarrassment on Jason Ironforge's face flashed away. Iron Manish Warmish turned around and looked at the chariot not far away, his expression focused and serious, and he didn't seem to care about Chen Xuan. Xuan's request to the goblins.

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

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

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

"And the contract can only last for a maximum of one Naraya day!"

Hutos's tone was very firm, and his eyes kept turning. The speed of eye movements was directly proportional to the speed of thinking. In the time it took him to say two sentences, he had no idea how many thoughts he had already had.

"Can."

Chen Xuan readily agreed.

The limited time limit is just a cover.

Moreover, with the current demonic disaster in Magatan City, no one is sure whether they can survive until the next Naraya Day.

Keeping on bargaining at this juncture not only failed to conceal his true intentions, but also made him feel like he was trying to cover up his intentions, as if he had taken off his pants and farted.

So Chen Xuan agreed readily.

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

Hutos was quite cautious and knew to let the guys test the waters first to see if there was anything fishy about the contract.

Little did they know that Chen Xuan's contract modification would only take effect after [crossing the border], how could it be exposed so easily.

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

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

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

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

There are also a series of supplementary instructions.

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 take action, and the goblins' clever behavior cannot change their fate of being eventually absorbed by Chen Xuan.

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

Seeing that the contract signing process went smoothly, Hutos Youji finally let down his guard.

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

In this way, the Magtan City Alchemy Workshop was taken under his command.

Instead of being busy [crossing borders], Chen Xuan introduced Hutos about the origins of gasoline and alcohol-based fuels, as well as about fossil fuels such as petroleum, as agreed.

Since the conversation involved confidentiality, Chen Xuan and the goblins went to the office to talk.

After he finished speaking, these alchemists with high-level professional titles fell silent.

But this silence did not last long.

A goblin alchemist sitting next to him suddenly raised his hand, and Chen Xuan nodded, indicating that he could speak.

"According to the description, does this oil look like the slurry recorded in "Narozoa"?"

"It is said that there are several slurry lakes in the wild basin where the trolls live."

"The ground slurry is very viscous and cannot be ignited directly, but there are often flammable gases floating on the lake surface."

"One of the slurry lakes was ignited on a large scale for more than two hundred Naloya years, and the flames have been burning to this day."

Its words quickly elicited responses from the other goblins.

Even Chen Xuan narrowed his eyes.

Judging from the description of this goblin alchemist, the slurry is really a bit like oil.

And the place where it appears is a basin, which is also consistent with oil-rich terrain.

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

Oil can spill out of desert basins in the Middle East and even cracks in the ground.

In addition to the fact that the continent of Naroa is full of magic, it has many things in common with Blue Star in terms of specific environments. It is not too strange that oil resources will be born.

"Okay, let's not talk about oil for now."

"The most important thing right now is OEM Molotov cocktails."

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

"I need to get at least 3500 Molotov cocktails within seven water 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 tapped the table gently.

All the goblins stood up and saluted.

Although the contract has not been modified yet, the master-servant relationship between the two parties has been determined.

Then all the goblins followed Chen Xuan out of the office.

Arriving at the venue, he took out gasoline and alcohol-based fuel from the storage compartment, as well as thousands of beer bottles.

As for the cloth strips, let the goblins find their own way to raise them.

The agreed manufacturing fee is 3 crowns per Molotov cocktail, and the total agreed price is 10,500 crowns.

Slaves are slaves, and business is business.

The alchemy workshop will summon all the alchemy apprentices in the city and assign at least half of the workers to pack the incendiary bottles.

After Chen Xuan finalized the matter, he suddenly felt more at ease.

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

Unexpectedly, Iron Man Wamish didn't leave.

Instead, Jason Ironforge returned to the association first with the blacksmith apprentices and the mana transport vehicle.

When Chen Xuan came out, Warmish took the initiative to walk towards him.

"Let's negotiate a deal."

"Give me one of these chariots."

"Whatever you ask will do."

"I know you have new materials and mechanical engineering department technologies."

"By the way, can I touch it?"

Tie Chi Wamish said calmly, his hoarse voice making him look even deeper.

Moreover, this guy has been looking at it for so long, but he has never touched it with his own hands. He has to ask the owner's permission before touching it. I don't know whether to call him dull or disciplined.

Chen Xuan nodded and motioned for him to please.

I saw Tie Chi Womishi stretching out his alienated huge palm and gently pressing it against the side of the tank.

Red light bloomed from his palm, covering the entire tank in an instant.

At the same time, a glimmer of understanding flashed in his eyes.

The bloody light immediately converged, and his expression became inexplicably complicated!

…