Vol 2 Chapter 120: Glass making

Richard didn't know what happened in the jewelry store, but after getting the ruby, it was considered to be all the raw materials for making cobalt blue. The rest is to make cobalt blue, and then make real cobalt blue glass. So, Richard and Gro went to the last place to go today-the glass factory of the Emerald Kingdom.
This place is not accessible to ordinary people, and even Gro is not allowed to enter or leave.
This is mainly because glass, especially high-quality glass, is an absolute luxury in the current world similar to the Middle Ages. Large-area glass mirrors are more expensive than gold, and small pieces of stained glass used to decorate colored windows in churches are also valuable. Even broken pieces of glass are not available to ordinary people, and are often scrambled by some aristocratic young women in gorgeous evening dresses and worn to attend dinner parties. In their view, the broken glass piece is more shiny and more representative of identity than any gem ring or pearl necklace.
To put it simply, glass is hardly touched by civilians. It is completely exclusive to nobles and has huge benefits. For this reason, a country often grasps the glass manufacturing plant firmly, places it in a remote place, and sends heavy soldiers to guard it. The craftsman is not allowed to leave the glass manufacturing plant for life to prevent the process from leaking.
In fact, this is also a true portrayal of the history of modern earth.
In the history of modern earth, around the twelfth century, Venice was the center of glass manufacturing in the world at that time. In order to monopolize glass manufacturing technology, all glass artists were directly closed on an island called Murano for centuries. .
In the current emerald kingdom of the world, it has not been exaggerated to this extent, but Gro also used his prince status and spent a lot of hard work before finally obtaining the qualification to bring people into.
After several identity checks, Gro took Licha into the glass factory of the Emerald Kingdom.
Inside the huge wooden shed, there are square pools, fires, and soaring heat. A large number of workers and craftsmen are constantly coming and going, climbing up and down on the shelves, and the cries continue.
"Shaq, go to the No. 1 furnace and see if it is extinguished!"
"Babesi, go to furnace 4 and check the fuel."
"Nus, there is a problem with the pool on the 15th. Go and ask Master Menghachi to see..."
The director of the glass-making factory, forties, with brown hair and high cheekbones, led the Richard and Gro, walking in the wooden shed with a respectful attitude. After all, it is one thing to guard the glass factory, but as the factory director, he is still fighting for the people in front of Gro. If he dares to have any disrespect, Gro will dare to throw him into the pool to make glass.
With such an attitude, Vichys is naturally unfavorable, and Richard will soon arrive at a temporarily shut down furnace, using some means to make cobalt ore, ruby, and phosphoric acid into cobalt blue pigment.
Then he handed the cobalt blue to Vickers, let the other party put it into the unformed glass according to a certain proportion, and finally produced the cobalt blue glass that met the requirements.
Victors did it quickly, and took the product after half a ring.
"This... Your Excellency Richard." Vickers handed a palm-size glass sample to Richard, and said, "This is just made according to your instructions. Just see...Is satisfied ."
Richard took the glass piece and briefly glanced at it, and he saw that the glass piece appeared sea blue, which basically met the requirements of cobalt blue glass, but...
Li Cha slightly shifted the glass and changed the angle of light, and he saw that the glass showed a light green color again, and his brows were suddenly wrinkled.
This is... glass with impurities.
Richard thought.
This should not have been deliberately made by Vickers. The other party does not have the courage or motivation, it is purely a process problem. In the current medieval-like world, the glass process has not reached the level of modern earth, and the more traditional process is used, that is, silica rich in silica (that is, the main component of quartz and sand) is used as a raw material. 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 (ie, soda) and potassium carbonate (potash, potassium alkali) are added to reduce the melting point of silica to about 1000 degrees Celsius. However, sodium carbonate will dissolve the glass in water, so it is usually necessary to add an appropriate amount of calcium oxide (cao) to make the glass insoluble in water.
In this process, many raw materials and minerals cannot achieve 100% purity, and some impurities will be mixed in, and iron, as the most common mineral element, is easily mixed into it. Eventually, after a series of reactions, ferrous ions are generated, making the glass appear light green in ferrous ions.
This is an unavoidable phenomenon, unless the entire process is improved, unless all raw materials and minerals are made to 100% purity, otherwise this problem cannot be solved from the source.
Generally speaking, this does not have much impact. In fact, on the modern earth, many low-cost glasses are pale green. In order to prevent the damage of beer caused by ultraviolet radiation, the bottle of beer is specially added with iron to make it dark green.
But the cobalt blue glass that Richard is now making is for flame color experiments. The role of cobalt blue glass is to eliminate the possible color effects to ensure that the true flame color is observed, so it should eliminate color differences as much as possible.
In this case……
Li Cha frowned deeply, thinking for a moment, and flipped his hand. There was 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 caused by ferrous ions in the glass through reaction~EbookFREE.me~ However, the concentration must be controlled. If too much, the glass will disappear after the light green color disappears.
Passing the manganese powder in the glass bottle to Vickers, Richard said, "Go and make the blue glass piece I want again. While making it, sprinkle this powder in again, the concentration is..."
After speaking a little bit, Richard looked at the slightly stunned Veitches and asked, "Do you understand?"
"Well, if you understand it, you understand it, but...what's the use of it, Your Excellency Richard?" Vickers said slightly doubtfully.
"You don't have to control, just do it." Richard said.
"Well, okay." Vickers glanced at Gro, who was a little bored beside him, and took the manganese powder given by Richard to find someone to operate it again.
After half a ring, Vickers walked back with the newly made cobalt blue glass. His face looked calm, but his hands were shaking, making it difficult to hide the excitement in his heart.
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