When he actually made the raincoat, Marin realized that he had thought simpler......

Gasoline does dissolve natural rubber, and after a few hours of dissolving, the raw rubber that has been cut into slices is essentially dissolved in gasoline.

Marin then had the tailor make a raincoat of later style, made of linen and the hooded kind. Moreover, there is also a brim in front of the hood to keep out the rain.

The cut linen raincoat was thrown into a gasoline solution of natural rubber and soaked through. Then, take it out to dry, rinse it again, and wash off the gasoline......

The raincoat is made without any problems when testing the rain resistance. But the test fire protection link ......

After all, it's a raincoat soaked in gasoline, and gasoline is a super still substance. A raincoat that has been soaked in gasoline for a long time is immediately like dry wood encountering a blazing fire when it encounters fire...... Maybe a little more active...... Then, the raincoat quickly became a firecoat......

"Flame trench coat ......" Marin suddenly remembered a piece of equipment from a certain game in his mind......

This kind of clothing, worn on people, is attacked by fire......

Forget it, don't mention it...... Marin was frustrated......

"Let's follow the original history...... Marin decided, or act as a chemist and make up the rubber solvent used to make raincoats in the original history, carbon disulfide......

Speaking of which, carbon disulfide is also flammable. However, the boiling point of carbon disulfide is lower than that of gasoline, only 46.5 degrees. The warm water in the bathhouse can reach this temperature.

After soaking the raincoat, soak it in warm water at 50 degrees Celsius to absorb the carbon disulfide gas in the raincoat. Because, this temperature, exceeds the boiling point of carbon disulfide.

What's even better is that it seems that in the vulcanization of rubber, there is a cold vulcanization technology. The method is to dissolve the raw rubber in a carbon disulfide solvent with a small amount of sulfur chloride added. And this vulcanization method is generally the vulcanization of thin film products.

It does not need to be heated by adding sulfur to rubber emulsion, which is very convenient. Moreover, in one step, it can not only vulcanize rubber, but also make raincoat film.

In addition, because of the vulcanization, this does not have the problem of the heat-resistant raincoat made of raw rubber in the early days. After all, vulcanized natural rubber is heat-resistant, corrosion-resistant, and wear-resistant.

Thinking of this, Marin didn't feel troubled anymore and immediately began to engage in carbon disulfide. As long as you get it out, you can directly make a mature raincoat in one step.

As for how carbon disulfide is made......

Marin thought for a long time, and then came up with the introduction in chemistry class from the depths of his memory - using charcoal powder and sulfur to isolate the air and heat it to more than 800 degrees......

This is relatively easy, Marlin sent someone to build a large sealed steel furnace. After carbon disulfide is obtained, it is collected through pipelines. The pipes are arranged a little longer and are surrounded by cold water. In this way, when the carbon disulfide gas cools to 46.5 degrees Celsius or less, it becomes a liquid and flows out. Marlin can then be collected by people and used to dissolve the raw rubber blocks.

As for the toxic gas leaking from carbon disulfide, Marin said it was not a problem. Because, when he was making aqua regia, he used activated charcoal and elephant skin or something to make a gas mask. As long as the workers are careful, it is still very safe. Of course, this production base must be kept away from residential areas, so as not to poison the residents of the east coast by gas leaks......

……

With the full theoretical support of Marlin, the production of carbon disulfide is not difficult. Soon, Marlin was able to collect a lot of carbon disulfide liquid. Although the purity is not high, the work he has to do requires very low purity of carbon disulfide. Then, modern raincoats are made, all of which are cold-vulcanized rubber skins, not afraid of rain or heat......

After this raincoat was manufactured, it was limited to the officers of the Sixth Legion, and then it was given to the officers of the British aristocracy. As for the soldiers or something, weave a little out of the grass so it's enough. Moreover, the cloth still has a certain protective power......

What Marin didn't expect was that the raincoat he came up with seemed to be very popular. This kind of modern raincoat similar to a trench coat, with a hood and a corset, and long leather boots, is called fashionable. And you're not afraid of rainy days......

The first raincoat was Angela, and she asked for a red trench coat-style tunic raincoat with pink leather boots, so that she would not be affected when she went out on a rainy day. Then, Angela fell in love with a walk in the rain – in a trench coat style......

Even if it's not a rainy day, wearing this kind of windbreaker with a corset and taking off the hood can still be used at that time. With Angela, the Grand Duchess, taking the lead, the high-ranking nobles of the North Sea Kingdom followed suit and asked Marin for this kind of raincoat with a tunic windbreaker. Of course, the colors are definitely different.

The women's ones are simple and rough - red or pink, and the men are casual, gray, black, or blue......

Moreover, in this era, dyes were basically extracted from plants, and some were extracted from minerals and animals, such as cochineal or something. Therefore, ancient dyes are also relatively expensive. Mainly, it's hard to collect. Unlike later generations, synthetic dyes of various colors were obtained by chemical means, which was inexpensive.

In these years, the red and blue, which were generally cheap in later generations, were relatively high-end dyes and were more expensive. For example, red, now the dominant red in Europe, is extracted from safflower, or made from the carcasses of cochineal.

Among them, the dyes used in the red uniforms of the famous lobster soldiers in later generations were mainly made from the corpses of female cochineal. And this cochineal is generally parasitic on cacti in dry regions of the tropics and subtropics.

Obviously, Europe does not have a dry climate suitable for cactus growth, so carmine in Europe is generally imported from the deserts of North Africa or West Asia.

Of course, Mexico is also a cactus-producing region. In later generations, Mexico was even known as the country of cacti, and it was also a major producer of cochineal. In any case, Marin intends to vigorously promote the cultivation and production of cochineal in the arid regions of Mexico.

Speaking of cochineal, the British also did a stupid thing - they introduced cacti in arid Australia to breed cochineal. As a result, cacti have bred wildly in Australia like rabbits, becoming a famous invasive plant, and like rabbits, they have become a huge pest in Australia......

Marin didn't have to do such a stupid thing, as long as he occupied Mexico, the land of cacti, he wouldn't have to worry about the lack of cochineal.

As for the blue, it seems that there are more indigo grasses in Scotland. For example, in the early years, when the Scottish hero Wallace resisted the British invasion, he specially used the blue juice of the local indigo grass to smear his face, known as the "Celtic Indigo Raider", which is a fierce saying......

But indigo grass requires a lot of land to grow, and no one wants to spend precious land on it. Moreover, the blue juice content of indigo grass is also low......

"That's right, Prussian Blue!"

Marin suddenly remembered a dye that didn't cost much, and the most important thing was that he knew how to produce it. Unlike most of the dyes of later generations, he did not know how to produce them.

Only the legend of Prussian blue, because it is an interesting historical story, Marin happened to read it, and he knew how to produce Prussian blue.

Speaking of which, the production method of Prussian blue is very simple - it is first roasted with plant ash and ox blood, and then the roasted substance is soaked in water, the insoluble impurities are filtered out, and then the yellow crystals are precipitated from the solution. This yellow crystal is then put into the ferric chloride solution, and a very bright blue precipitate is produced. This blue precipitation is a very good paint - Prussian blue......

Prussian blue is brightly colored, and it is not easy to fade. In addition, the cost is not high. After the appearance of this dye, the Prussian army began to use this Prussian blue to dye army uniforms. Because the quality of the dye is good and the cost is not high, it is a very good choice for military clothing. It wasn't until just before World War I that the Bear Child changed the German army's obedience to Prussian blue and changed it to earth gray.

Of course, Wei Er can't be blamed. Because, World War I was already the era of trench warfare. Everyone lies in the dirt pit all day long, dirty, and the dirty gray military uniform is more suitable for the trenches. If the Prussian blue uniform is soiled in the trenches, it is easy to see......

……

Thinking of this, Marin laughed - there is one more way to make a fortune! Even if the most primitive method is used to produce Prussian blue, the cost is not high.

For example, plant ash, this thing is available in every house. As long as the earthen stove is used, there is plant ash. And cow blood, this thing is not easy to find in Huaxia, because it is not allowed to kill cattle there. But in the North Sea country, Marin imports tens of thousands of cattle from Crimea every year, some of which are used for arable land, and a considerable part of which are used for slaughtering and eating beef. Therefore, there is absolutely no shortage of cow blood, and the cost is not high. Ferric chloride is not a rare thing, it is easier to get. With Marin's knowledge of chemistry, it is still very good. In this way, there is no problem in the production of Prussian blue.

Then, Marin also began to think about it - should he change all the Beihai troops into blue uniforms? After all, the white vest is too easy to be copied, and it's a bit low......