Don't look at Savi's white and chubby, but when it comes to making glass, he still has two brushes.

He first tied a thick cowhide apron and put on heat-insulating cowhide gloves, skillfully added the ingredients to the iron pot, stirred evenly, and then began to light a fire, and when the fire was completely up, he began to pull the bellows.

'Huh~Huh~Huh~Huh~'

The flames in the furnace suddenly became very violent, and the bright yellow flames tightly wrapped around the crucible, and after a while, the raw materials in the crucible began to react and melt.

"Lawson, it's time to start stirring." Savi poured evenly sized charcoal into the stove as he tugged at the bellows.

Rosen looked left and right, and saw an iron rod wrapped in strips of cloth on the side of the crucible, and he put on insulated cowhide gloves, picked up the iron rod, and reached into the crucible and stirred it continuously.

At first, the iron rod felt a little astringent when it was stirred, but the more it was stirred, the lighter it became, and gradually, Lawson felt as if he was stirring a pot of viscous maltose, which felt very light and slightly sticky, and made a 'clattering' sound when stirring.

Savi glanced into the cauldron and nodded, "Almost." ”

Lawson took out the stirring iron rod, and saw that the iron rod was stained with a ball of red glow, similar to viscous honey-like glass melt, in the high temperature state, the glass juice looked quite beautiful.

However, the layman looked at the excitement, and the insider looked at the doorway, Savi shook his head again and again when he saw the molten glass juice: "No, no, your technique is wrong, too many bubbles have been mixed in." ”

Rosen also saw bubbles, and a large number of fine bubbles could be seen in the molten glass juice he stirred, and the transparency of the glass was greatly affected.

"How do you usually remove air bubbles?"

Savi stretched out his hand to wipe the sweat from his forehead: "I can only wait, if the melting time is kept for a long time, the bubbles will slowly run out, but it is very charcoal to do so." There are too many bubbles in our furnace, which can be regarded as scrapped, and the things we make can only be sold as defective products. ”

"Not necessarily."

Rosen smiled slightly, and he probed the iron rod back into the molten glass and began to stir gently, while he immersed himself in his mind and activated the power of alchemy.

The power of thought extended into the crucible, grabbed the bubbles in the molten glass, and pulled them out.

If someone looks at the molten glass at this time, they will find that the bubbles in the molten juice suddenly accelerate upward, but in just 4 seconds, all the air in the molten glass will be emptied.

But that's not all.

The glass fired by Savi always has some pale green, but pure silicate glass should be colorless and transparent, and the reason why it has a green color is because the raw material is mixed with some divalent iron impurities, as long as the impurities are removed, this problem can be solved.

Lawson carefully sensed the situation in the molten glass, and after a few seconds, he felt the presence of a lot of special aura.

There are many kinds of breaths, the vast majority of which are naturally glass, and the rest are very rare, but they do exist.

'The Friends of the Second Layer Elemental is really good, if it was before, I would definitely not be able to find so many impurities, let alone clear them, but after the ability is improved, there will be no big problem. ’

Glass molten juice is a liquid, in which the molecular atoms can move freely, Lawson wants to remove impurities, only need to overcome the intermolecular forces, it is not difficult.

Rosen was very familiar with this process, not only removing the ferric ions, but also separating all the other impurities. Soon, all that remained in the crucible was pure molten glass juice.

After about three minutes, he withdrew the power of alchemy, walked to the clay mold on the side and brought it over: "It's okay, start pouring glass juice." ”

"Hey, didn't you say the mold doesn't work?" Savi raised his hand to wipe the sweat from his forehead, his eyes full of puzzlement.

Rosen smiled slightly: "If you can't use it, I can still use it." Pour it out. ”

"......" Savi was speechless, but at this point, he could only choose to believe Rosen.

He picked up the large iron clamp and clamped the entire crucible, then carefully moved it to the mold, and began to slowly pour hot glass juice into the mold.

The moment the glass juice appeared, Visa's hand trembled slightly: "Hiss~ How is it possible?!" ”

The glass juice used to be full of fine bubbles, and the color was very cloudy, but now the glass juice poured out not only does not have a single bubble, but the color is crystal clear, just like the most beautiful crystal in the world.

Savi has been a glazier for many years, has seen countless glasses, and he still has an eye, and as soon as he sees such a color, he knows that this pot of glass is extraordinary.

"Hold it in your hand, keep pouring." Rosen urged.

"Oh, good, good."

Savi took a deep breath and continued pouring glass juice into the clay mold until it was full, and he carefully placed the crucible back on the stove.

"How long does it take for glass to get cold?" Rosen asked.

"About twenty breaths, not long."

As he spoke, Savi's eyes remained fixed on the glass in the mold as if he were looking at a rare treasure.

Rosen didn't care about him, he quickly activated the alchemy power, and the tentacles of his mind reached into the glass juice in the mold.

'A good lens not only needs good light transmission, but also needs a perfect shape. These are all related to the order of the molecules...... The last time I prepared nitroglycerin, I had a new understanding of quantum electrodynamics, and I just happened to practice my hands with this piece of glass. ’

As Rosen thought about it, the molten glass juice in the mold began to surge slightly, as if it had come to life.

"O gods, it's moving, it's moving!" Sawi on the side pointed his chubby fingers at the glass juice, and his eyeballs almost fell out of his sockets.

Lawson ignored him and continued to remodel the glass.

After more than half a minute, the glass dissolution has basically cooled, turning into a mass of glass without any color, it is highly transparent, crystal clear, and purely like a pool of solidified water. When you look at it, you will be moved by a strong feeling for beautiful things.

"Incredible! It's incredible! Flawless, like a frozen moonshine! Savi muttered quietly. His eyes were glued to the glass, he took the mold in one hand, and with great care, he knocked out the glass lens that had solidified inside, and put it in his hand to look at it carefully.

"Oh my God, it's so beautiful, how can there be such wonderful glass in the world?"

"No, it can't be natural, it must be magic!"

"Rosen, I just saw that this glass juice moves on its own, you must have used magic, right?"

"I used magic." Rosen nodded.

Savi was relieved: "That's right. Ordinary people would never be able to make such immaculate glass lenses, only magic can do that. Oh my God, it's the most beautiful treasure in the world! ”

The more Savi looked at it, the more he liked it, the more he looked at it, the more reluctant he was to let go, and for a moment, he even had an urge in his heart to use all his belongings to replace such a lens.

Rosen naturally didn't know what he thought, he smiled: "What you said is not wrong, ordinary people really can't do it, but if you just want to make the glass colorless, and have the quality of this glass, ordinary people can still barely complete it after a long time of practice." ”

Savi's heart shook violently, and he immediately asked, "What should I do?" ”

Rosen laughed, raised a finger and shook it in front of him: "Savi, you must have heard the saying that there is no such thing as a free pie, right?"

Savi was thrilled and immediately said, "What price do I have to pay?" As long as I can afford it, I will give it! ”

"Pay me 1,000 rions now, plus three days of access to this glass studio. And, during the time I've been using the studio, you're going to be my assistant for free. In return, I'll give you the recipe for colorless glass, as well as a full set of methods for crafting magic lenses. If you want to know more about the principles involved, I'll teach you a little bit about geometric optics. ”

"A new way to build a magic lens...... And a few more ...... Geometrical optics? Is this true? Can I learn such an esoteric principle? Savi was stunned again.

1000 Ronte is a lot, but he can barely afford it, if he can learn a new trade, what is this money?

The right to use the glass studio for three days, and to be Rosen's assistant, he couldn't ask for it. But Rosen's last words made him yearn and apprehension.

Although he wanted to know the principle of the magic mirror, in his opinion, the magic mirror was really wonderful, and the principle behind it must be extremely profound, and his mind was too stupid to understand the mystery.

Rosen raised a finger and waved his hand in front of him: "Don't worry, I will teach you until you fully understand." ”

Geometric optics are nothing more than the refraction and reflection of light, and if you can't understand it, you'd be a fool.

Savi's doubts disappeared in his heart, he was very excited, and the flesh of his whole body trembled: "No problem, absolutely no problem, don't say it's three days, a month, a year, it's no problem...... It's blocked, I'll get you the money now! ”

By now, he no longer had any doubts about Lawson's alchemy skills, and as soon as he finished speaking, he ran to the shop in front of him, and after a few minutes, he ran back with a bulging money bag: "Master, the money is here, you can order it." ”

Lawson weighed it with his hand for a moment, and then put the money bag aside: "Very good, then let's start now." We'll fix the baron's magic mirror first, and then I'll need to make some glass molds. Of course, all the materials required for these appliances are up to you. ”

Savi deserved it very simply: "Master, there is no problem. Though you call me, I will not complain. ”