After all, judging from the current situation of sea routes, most of the ocean routes were built by European colonists with human lives.
After these European colonists mastered the route, they would keep it secret and never wanted to be known to outsiders.
If colonists from other countries want to know the route, they can only continue to explore it with their own lives.
The biggest risk is sudden strong winds and waves at sea, followed by food spoilage, water shortage, sepsis, etc.
Unknown how many colonists died on the sea every year, which invisibly slowed down the pace of European colonization of the world.
Therefore, Zhang Feifei's considerations are well-founded.
But Fang Xiaoyue had already considered this: "Lao Zhang, we don't need to control the quantity of canned food sold. We only need to reduce the shelf life of canned food and not sell canned vegetables and fruits to the outside world. After all, Europeans don't have it yet."
We know that septicemia is caused by a lack of vitamins. Even if we don’t sell canned food, those Europeans won’t stop because of this. Besides, are we, the Star Sea Congress, slower than them?”
Fang Xiaoyue's words caused Zhang Feifei and the participants to think deeply.
Indeed, whether you sell canned food or not, Europeans are paving the way with their lives and discovering each route.
Are we afraid of competing with those Europeans even though we have the technology?
Fang Xiaoyue's words finally convinced Zhang Feifei and others, and the preparations for the canned food project went smoothly.
Of course, the most important technical difficulty of this canned food is the gold plating process.
After all, with the current productivity of Xinghai Kingdom and if there is no fear of imitation by outsiders, using tin-plated iron sheets to make canned food is the cheapest and most cost-effective way.
The so-called tin-plated iron sheet is actually what later generations called tinplate.
In this era, the gold plating process had not yet appeared at all, and the tinplate proposed by Fang Xiaoyue was undoubtedly an epoch-making product.
Simply put, the benefits of using tinplate to make canned food lie in two points. Tinplate is easy to cold-roll and shape, and secondly, tin plating can oxidize with the residual oxygen in the can to prevent the food in the can from being oxidized and can last longer.
Guaranteed perfect eating taste.
Tin plating liquid, cold rolling process, etc. are all recorded in the library, so Fang Xiaoyue found these information easily.
As for thin iron plates, the hot-rolling process that Fang Xiaoyue took the time to design is still a bit rough.
When the molten steel is poured into the steel-making furnace, it is directly shaped into a 10 cm thick steel plate. Then, before it is completely cooled, it is directly put into a hot rolling mill made of two bearings. After five hot rollings and three cold rollings, it is made into 1mm
, thin iron sheets in three specifications: 0.75mm and 0.5MM.
This is considered to be a temporary standard for thin iron sheets.
If there are any projects that require thin iron sheets in the future, you can choose from these three specifications.
Of course, compared to the thin iron sheets of later generations, these thin iron sheets made by Fang Xiaoyue are still a little thicker.
But this is already the limit of existing processing technology.
And the overall thickness is not too uniform, it can only be said to be barely usable.
After the thin iron sheet is punched out, you can use the prepared tin plating solution for tin plating.
In order to extend the shelf life of canned food as much as possible, many tinplate cans in later generations were tin-plated on both sides.
But Fang Xiaoyue only tinned one side of the thin iron sheet here, which was used as the side of canned food that comes into contact with food.
The outside side is not tin-plated.
The advantage of this is that you can control the shelf life of food.
After experiments, if the thickest 1mm thin iron sheet is tin-plated, it is cold-rolled into cans, filled with fruits, beef, pork, vegetables and other foods, and then sterilized and sealed at 380 degrees.
In a specific accelerated corrosion environment, these cans will be corroded through the iron sheet in up to 10 days, thus ending their shelf life.
Of course, if this is converted into a normal environment at sea, these cans can last for almost half a year.
The 0.75MM can can last for four months under normal conditions at sea.
0.5MM cans can only last for two and a half months.
Compared to later generations, this shelf life is relatively short.
But in this age of exploration, this is already considered a miracle.
Fang Xiaoyue does not intend to promote the 1MM canned food. This canned food with the longest shelf life will become the standard battlefield food of Xinghai State, Navy and Army.
The first batch of 0.5MM canned food became the key product promoted at the trade fair specially held by Chen Liuxiang.
As for water, Fang Xiaoyue developed a tinplate cold-rolled iron bucket. This kind of iron bucket is tin-plated inside and outside, but it can only be sealed manually, so the shelf life of the water is only one week.
This thing can be used to store food, but the shelf life is only extended for a few days, so it's not very useful.
Of course, for those maritime merchants, such iron buckets are definitely much more convenient to hold water than those wooden buckets.
After researching canned food, Fang Xiaoyue handed over the subsequent research to other technicians.
Those technical personnel have worked hard to diversify the development of canned food.
At the trade fair, Guangchen Liuxiang exhibited canned foods such as canned braised beef, canned braised pork, canned braised sea fish, canned red dates and glutinous rice, canned boiled mutton, etc.
No wonder there are so many canned meats. Unfortunately, the Ministry of National Security now strictly prohibits the export of canned fruits and vegetables. Even the various canned pickles that technicians worked hard to create are directly banned from export.
I have to say that this trade fair was extremely successful.
After Chen Liuxiang showed up at the trade fair, he handed over the management of the trade fair to his senior staff while he sat in the conference room and signed large and small contracts with the crazy maritime merchants.
The accounting staff in the Commercial Affairs Department were exhausted just collecting deposits.
No way, although some maritime merchants are already accustomed to using stainless steel coins produced by Xinghai Kingdom.
However, there are still many new maritime merchants who have no stainless steel coins when they first come into contact with them. They can only find ways to sell their goods or pay deposits with the gold and silver they carry.
Next, Fang Xiaoyue focused on printing.
The reason why he focused on printing was not his consideration, but the request of Chief Consul Zheng Xiangdong.
One is that after the Xinghai Kingdom takes over the entire South China Sea Island, the Xinghai Kingdom needs to carry out publicity activities on the entire island to facilitate the effective inclusion of the entire island within the scope of its rule, so that the people of the entire island can accept and approve of the Xinghai Kingdom in the public opinion environment.
rule.
There is no doubt that the best way of propaganda in this era is to post notices and distribute leaflets, so that literate people can publicize and explain the policies of Xinghai Kingdom.
And this requires a lot of printing.
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