Magus Tech Chapter 120: Glass making

Li Cha doesn't know what happened in the jewelry store, but after getting the ruby, he has collected all the raw materials for making cobalt blue, and the rest is to make the cobalt blue, and then make the real cobalt blue glass. So, Li Cha and Gero went to the last place to go today - the glass factory in the Emerald Kingdom.

This place is not accessible to ordinary people, even Gero cannot enter and exit casually.

This is mainly because glass, especially high-quality glass, is an absolute luxury in a world similar to the Middle Ages. Large-area glass mirrors are more expensive than gold, and small pieces of stained glass used to decorate stained windows in churches are also valuable. Even broken glass pieces are not available to ordinary people. They are often inlaid in gorgeous evening dresses by some noble young women and worn to attend dinner parties. In their view, broken glass is more shining and more representative of identity than gemstone rings and pearl necklaces.

To put it simply, glass is almost never touched by commoners, and it is completely exclusive to nobles, with huge benefits. For this reason, a country often firmly grasps the glass factory, places it in a remote place, and sends heavy guards, and the craftsmen are not allowed to leave the glass factory for life to prevent the process from leaking.

In fact, this is also a true portrayal of modern earth history.

In modern earth history, around the twelfth century, Venice was the glass manufacturing center of the world at that time. In order to monopolize glass production technology, all glass artists were directly enclosed on an island called Murano for a long time. centuries.

In the Emerald Kingdom in the current world, it has not been exaggerated to this extent, but Gero also used his status as a prince to finally obtain the qualification to bring people in after a lot of twists and turns.

After several identity checks, Gero led Richard into the glass factory in the Emerald Kingdom.

In the huge wooden shed, square pools are everywhere, stoves are everywhere, and the heat is soaring. A large number of workers and craftsmen are constantly coming and going, climbing up and down on the shelves, shouting constantly.

"Shaq, go to No. 1 furnace and see if the fire is extinguished!"

"Babes, go to No. 4 furnace and check the fuel."

"Nus, there is a problem with pool 15, go and ask Master Monhaci to have a look..."

The director of the glass factory—Vices, in his forties, with brown hair and high cheekbones, led Richard and Gero in the wooden shed with a respectful attitude. After all, it is one thing that the glass factory is heavily guarded, but as the factory manager, he is still just a commoner in front of Ge Luo. If he dares to be disrespectful, Ge Luo dares to throw him into the pool and make glass.

Viciss has this kind of attitude, which is of course beneficial. Richard will soon arrive at a furnace that is temporarily shut down. Through some means, cobalt ore, ruby ​​and phosphoric acid are produced into a pigment called cobalt blue. .

Then hand over the cobalt blue to Vinces, and let the other party put it into the unformed glass according to a certain ratio, and finally produce the cobalt blue glass that meets the requirements.

Vices did it quickly, and brought the product after a while.

"This...Your Excellency Richard." Vince handed a palm-sized glass sample to Richard, and said, "This is just made according to your instructions. Look... …are you satisfied.”

Li Cha took the glass piece and glanced at it briefly, and saw that the glass piece was sea blue, basically meeting the requirements of cobalt blue glass, but...

Li Cha tilted the glass slightly, changed the incident angle of the light, and saw a light green color appearing through the glass again, and his brows suddenly frowned.

This is... a sign that the glass has impurities.

Li Cha thought.

This shouldn't have been done on purpose by Vinces. The other party didn't have the guts or the motivation. It was purely a matter of the process. In the current world similar to the Middle Ages, the glass technology has not reached the level on the modern earth, and the more traditional technology is used, that is, the silica rich in silicon dioxide (that is, quartz, the main component of sand) is used as raw material to make glass. Make glass.

The melting point of silica is 2000 degrees Celsius, and it is difficult for ordinary furnaces to meet the requirements. In order to reduce the difficulty of production, sodium carbonate (soda) and potassium carbonate (potash, potash) will be added to reduce the melting point of silica to 1000 around degrees Celsius. However, sodium carbonate will make the glass soluble in water, so an appropriate amount of calcium oxide (cao) is usually added to make the glass insoluble in water.

In this process, many raw materials and minerals cannot be 100% pure, and some impurities will be mixed in to some extent. As the most common mineral element, iron is easily mixed into it. Finally, after a series of reactions, ferrous ions are generated, which makes the glass appear light green of ferrous ions.

This is an unavoidable phenomenon. Unless the entire process is improved, unless all raw materials and minerals are made 100% pure, otherwise this problem cannot be solved from the source.

Generally speaking, this doesn't make a big difference, and in fact on modern Earth, a lot of low-cost glass has a greenish tint. In order to prevent the beer from being damaged by ultraviolet radiation, the wine bottle for storing beer is specially added with iron element to make it dark green.

But the cobalt blue glass that Richard is going to make now is for flame experiments. The role of cobalt blue glass is to eliminate possible color effects to ensure that the real flame color can be observed, so the color difference should be eliminated as much as possible.

In this case...

Li Cha frowned deeply. After thinking for a moment, he flipped his hand and found a small glass bottle in his hand, which contained half a bottle of off-white metal powder, which was manganese powder.

Since the problem cannot be solved from the source, it can only be solved from the last link. A small amount of manganese can change the light green color in the glass caused by ferrous ions through reaction ~IndoMTL.com~ But the concentration must be well controlled, if too much, the light green color will disappear and then lavender will appear in the glass.

Passing the manganese powder in the glass bottle to Vicis, Li Cha said: "Go and make the blue glass piece I want again, and sprinkle this powder in while making it, the concentration is ..."

After speaking for a while, Li Cha looked at Vicis, who was a little dazed, and asked, "Do you understand?"

"Uh, I understand it, but... what's the use of this, Your Excellency Richard?" Vicis said with a little doubt.

"You don't have to worry about it, just do it." Li Cha said.

"Um, alright." Viciss glanced at Gero, who looked a little bored beside him, and took the manganese powder that Richard gave him to find someone to operate.

After a while, Vicis came back with the newly made cobalt blue glass. His face looked calm, but his hands were shaking, and it was difficult to conceal the excitement in his heart.

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