Despite the Carolingian Empire's laws prohibiting the export of armour, the ancient Mercians had purchased a lot of Frankish armor through various means, and at a time when the northern world was still lagging behind the mainland, even the Danish swords were often produced in France or the Holy Roman Empire. The famous Ulfbert steel sword, which is said to have been made by Frankish craftsmen from Persian and Indian ingots, was once seen in the collection of the Count of Northumbria, and he recognized the material he had called Uzi steel in his previous life. The weapon in Volsiov's collection belonged to King Canute's father, Sven "Bazihu", and was later given to his father, Count of Northumbria, Hughed, by King Hardknout. This ancient artifact was significantly sharper than the sword of the Arcane King that Edgar used for his coronation, which of course existed more as a relic of the royal power of England.

Although Edgar had never been to Persia or India in his previous life, he had admired many precious Sikh daggers at the Crystal Palace in London, and had seen the mysterious "Damascus knife" in Egypt. He was also very envious of this kind of sword with brilliant patterns and sharpened iron like clay, but he could not obtain the intermediate material used to make all these works of art, the Uzi steel ingot, not to mention that as far as he knew in his previous life, the production cost and output of Uzi steel were far from cheap and sufficient, and even if Edgar had the means to study this crucible steelmaking process, he could only produce some high-level art appreciation, which was obviously not suitable for the manufacture of armor and weapons for the army.

After meeting with the Count of Northumbria, King Edgar gathered a group of craftsmen from different regions, and spent a lot of money to hire high-level craftsmen in France and Italy, preparing to build a royal armory near Greenwich. However, Edgar felt that the power of the royal family alone was not enough, and he planned to build a free town of craftsmen in Greenwich to develop the arms and armor trade, and in doing so, he was going to help the new city develop a strict system of rules for the trade, borrowing from the Norman guild system. Unlike the ordinary blacksmith shops in the countryside, the king wanted Greenwich's weapons, armor, bows and arrows to have at least one master craftsman, two professional craftsmen and one apprentice, all of whom had to be inspected for quality before they could be marked with Greenwich's merchandise.

Although there were many blacksmiths in England, most of them were at the level of mending pots and making daily sundries in the countryside, and after Edgar introduced the shoesh, a few of them were now in contact with the new business of nail horseshoe, but the high-level craftsmen who made weapons and armor still needed to be brought in in a large number from overseas. Through Count Robert of Flanders, King Edgar was able to transport hired craftsmen from all over the continent to his kingdom, including some Greeks. Although these craftsmen hired a lot of money are not the famous craftsmen of ancient legends, in Edgar's eyes, they are tantamount to the treasures of the kingdom.

In most parts of England, biogas iron is still the main raw material, and the process is quite rudimentary, generally produced iron mixed with a large amount of slag, and the intermediate product after the initial removal of some impurities looks like a sponge, which needs to be removed by means of heating and repeated folding and forging, and making the impurities that are difficult to remove by burning evenly distributed. When crafting weapons, various materials need to be heated, and the purpose is roughly carburizing, but the Italian only mentions that this process increases the hardness. The iron rings of chain mail are made by a multi-hole wire drawing machine, but they are often not made of refined materials with low impurities like swords, and they are not subjected to subsequent hardening treatments such as quenching.

Edgar suggested that the chain mail be quenched like a sword, and finally, the Italians devised a scheme that roughly put an ordinary piece of chain mail into a pot, sprinkle some bamboo powder on it, and then seal it and heat it until it was warm enough, and then clamp it with iron tongs, and then use a hammer to knock the pot and put it into the water. In order to prevent the iron ring from breaking, it is necessary to put it in vinegar and shake it repeatedly after removing it from the water......

However, the fundamental problem is the iron-making process, Edgar describes the more common method of making cast iron in blast furnaces, which has the advantage of a higher carbon content that lowers the melting point of the ore, unlike the process of making wrought iron, which is sufficient to bring the ore to a liquid state at the current temperature, but the ingredients that need to be added need to be selected through trial and error to help with slag making. The final pig iron can be decarburized to obtain steel, the more superficial way is of course to forge pig iron and wrought iron to reduce the carbon content, but such a product is not homogeneous enough, and further can be decarburized by some methods of feeding into the air, the general scale of production can use the Renaissance Walloon furnace and the like, as for the industrial steelmaking of his previous life, it requires a large number of different converters made of steel and refractory bricks.

The Italians were speechless, as if frightened by the king's description, but at last he decided to experiment with chain mail hardening, and Edgar felt that he had said too much, and immediately agreed to Arlotto's suggestion.

In the summer of that year, for the first time, the English carried out artificial beneficiation after mining the ore, and the miners crushed the iron ore to remove some impurities from the surface, and then piled it up and transported it away with charcoal. In the iron-making area, craftsmen made bellows from seal skins hunted at sea, and made blowers out of wooden frames, ropes, and other materials combined with waterwheels to heat the charcoal and ore in the furnaces.

After painstakingly making the spongy pig iron, they first tried to forge mild steel with wrought iron, and then experimented with heated air to drum into the furnace, and at high temperatures, the mouth of the shallow furnace was shrouded in the fire of the burning molten iron, and the molten iron became more and more viscous, and one of the Greeks at the scene shouted: "Attention, the iron is returning to its original state!" ”

According to his opinion, the molten iron, protected by the charcoal layer, finally maintained its quality, and finally the finished steel that had been slag discharged finally appeared before the eyes of the English when the charcoal that had burned red was knocked off in the gray.

The iron from Mercia and Wales was transported to Greenwich, where the artisans checked the quality and were relieved that they finally had to worry about the raw material.

For the first time in 1073 A.D., two years after the Battle of St. Lô, English merchants stopped exporting iron ore overseas and replaced them with high-quality steel tools and armor, and at the same time, ten half-suited horse armors were sent to King Philip in the hunting palace of Fontainebleau, with delicate rings and pieces of iron shining with a faint blue light, and a bipedal wyvern and GW of Rune were engraved between the iron face and the neck, which is the symbol of Greenwich.