Master descends to earth

Chapter 52 Dragon Scales
Su Yuan nodded after listening, and looked at the professional whetstone. If a worker wants to do a good job, he must first sharpen his tool. Since there are better ones, there is no need to use them.

Take out the tool, fix the sword embryo, take a deep breath, stare at the sword body, and prepare to open the sword spine.Feel the direction of the golden light and flowing water, slowly follow and gradually apply force.

Xu Kui and Liu Sheng Huimei didn't dare to breathe, they stared at Su Yuan's every move, once, twice, three times, five times, ten times...

I don't know how long it took, Su Yuan looked at the more dazzling golden light in front of him, and he had already reached the tip of the sword, and he was just a step away.

"It's done!"

Following the last stroke, there were bursts of clear sounds in the ear, and the golden light soared, extremely dazzling.All the rays of light seemed to find a breakthrough, and instantly poured into the tip of the sword, as if they had opened up Ren Du's two veins and were reborn from the cocoon.

Su Yuan stood up, his eyes were a little sore, he was finally one step closer to success, and he was in a good mood.Give the sword to the two curious babies, wash your face, and rest for a while.

"This is……"

In the eyes of Xu Kui and Liu Shenghuimei, the sword embryo, which was originally as clear as water, seemed to be steaming, exuding a breath-taking aura, and soon calmed down again.Like a tiger in the mountains, it lies dormant, waiting for the thunder to strike.

"Good sword!"

The two were shocked, they had never seen an unpolished sword embryo so breathtaking!
Su Yuan took back the sword embryo, touched the blade lightly with his hand, took out the whetstone, dipped it in cold spring water, and began to polish it.Grinding the sword is like grinding the heart, and the fingers keep feeling the subtle changes of the blade, following the lines of the golden light, getting rid of the greenness, removing the false and preserving the true.

Xu Kui and Liusheng Huimei sat beside them quietly, feeling Su Yuan's movements with their hearts, especially Liusheng Huimei. Grinding skills are a secret in the island country, especially the overall grinding, and even their own sons may not be eligible to inherit it.

Grinding is very familiar to Xu Kui. I don't know how many Longquan swords he has polished by himself. Looking at Su Yuan's unique technique, theoretically speaking, different sharpening directions can obtain very different sharpening effects.

The blade lines are parallel to each other and perpendicular to the cutting edge. The sharpness and strength of the blade are the highest. The worst.

If he had to choose, he would recommend the oblique edge grinding method. Compared with the longitudinal edge grinding method, it is more convenient to grind this way, and the second is that the area to be ground is wider and more efficient, and the edge sharpened in this way is sharper.

The operating force of each grinding process is from small to large, then maintain the force, and then gradually decrease.This is because at the beginning, the bonding area between the whetstone and the cutting edge is very small, and the operation with a slight force can prevent the cutting edge from being scratched.

As the sharpening progresses, the bonding area between the whetstone and the blade also increases, and the strength should also increase accordingly.When the sharp area is about to appear, the force should be reduced to prevent the stone from scratching the cutting edge, and the burr will appear in advance and the sharpening marks will be reduced.

Grind to a certain extent, raise the sword to the light and observe, if you can see an obvious white line on the blade, it means that the blade is still relatively thick, and these parts with white lines should be grinded emphatically. If you don't come out, you are qualified.

Su Yuan put down the sword embryo, wiped it gently with clean water, and explained: "In my opinion, the sharpness of a sword is mainly determined by five elements. The smaller the edge angle, the sharper the blade, the smaller the cutting resistance, and the sharpness The sharpness is also higher, which is the most important key to the sharpness."

The expressions of the two were shocked, and they concentrated on listening to the words and deeds of the master, especially Emi Yagyu. They were very excited. Even if they are the eldest daughter of the Yagyu family, it is a great honor in the island country.

"Secondly, the smaller the cutting edge radius, the lower the cutting pressure, and naturally the sharper it will be. If the direction of the cutting edge is the same as the cutting direction, it will be easier to cut in, so the cutting edges are parallel to each other and perpendicular to the cutting edge, that is, It is best when showing the vertical edge pattern."

Su Yuan experienced it personally while talking, which is also a rare experience for him to combine theory with practice. With the help of Wuxingshu and Xiangjian master, he can understand every detail clearly and naturally do a job with ease.

"Finally, the micro-serrations produced by the blade pattern on the edge of the blade are also conducive to improving sharpness. When the tooth direction is consistent with the cutting direction, the lower the cutting pressure, the sharpest the blade will be."

"The tip of the sword is about to be polished!" Xu Kui stared at Su Yuan's hands, the tip of the sword is the most important and the most difficult craft for polishing.

I saw Su Yuan put the tip of the sword on the upper left corner, at a 45-degree angle with the whetstone.When sharpening the left blade, press the thumb on the body of the blade, and hold the handle with the other four fingers.

When sharpening the right blade, press your thumb on the anti-skid groove on the back of the knife, press your index finger on the blade, and hold it with the other three fingers.This position makes it easier to fix the sharpening angle of the sword.

The reason for holding the knife with one hand is that when using both hands, there are two forces acting on the sword, and the unbalanced force causes the surface of the blade to be uneven and prone to convex surfaces.

Su Yuan concentrated all his attention, the tip of the sword was the key position, so he couldn't be sloppy in the slightest.Take a deep breath, and use even force with both hands, not lightly.If it feels smooth, it means that the flat surface of the blade has been attached to the whetstone, and the effect is the best at this time.

If it feels astringent, it means that the blade is only partially polished, and you need to stop and re-adjust the grinding angle. The best way is to remember the distance between the back of the knife and the grinding tool, and then move forward slowly while sharpening the blade, and then retreat the sword body, until every part of the blade is sharpened.

"Pay attention to Master's ring finger!"

Xu Kui quickly discovered the way, and reminded Emi Yagyu next to him in a low voice: "Although the cooperation of the thumb and ring finger is most suitable for high-precision manual operations, such as controlling the throttle of a motorcycle, opening a safe, holding a baseball bat, etc. It's a very high job, but the ring finger's participation is indispensable."

"Pay attention to the movement of the master. It is mainly the horizontal swing of the forearm. When the thumb and ring finger cooperate naturally, the position of the whetstone is just on the extension line of the forearm. When grinding horizontally, the up and down movement of the movement must be kept to a minimum!"

"In this way, we can try our best to achieve the final plane, not the arc surface. Also, you should hang your index finger in the air, not put it on the whetstone, and feel the feedback from the sword body with your heart. Prioritize and focus on it."

Su Yuan heaved a sigh of relief, and finally completed the first round of overall grinding. Hearing Xu Kui's analysis, he smiled and said, "You are roughly right, but don't ignore the role of the little finger. Basically, rough grinding: light→light→heavy→light→ Micro. Medium grinding: micro→slight→slight. Fine grinding: extremely fine→slight→very fine.”

Xu Kui and Yagyu Emi quickly stood up, bowed deeply to express their gratitude, and passed on a word of truth, and a hundred thousand books of false.One sentence reveals the true meaning of sword grinding, which will benefit the two for life.

"Is this..."

Xu Kui took the sword embryo, looked at the effect of the first polishing, suddenly turned pale with shock, and said in disbelief: "Dragon scale pattern!"

Huimei Liusheng hurriedly stepped forward, staring at the faintly strange textures on the clear water-like blade, a thought flashed in her mind, and she blurted out: "The pattern on the Lumo knife...it looks like a dragon pattern...it is called dragon scales in history. !"

According to Cao Pi's "Dian Lun", when Pi was the prince, he ordered Guogong to refine three swords, three swords, two daggers, and one Lumo knife, all of which were named after their appearance.

The sword whose color looks like a rainbow is called Liucai, the sword whose writing looks like a turtle is called Lingbao, and the sword whose color looks like danlu is called Hanzhang.

He also made a Baibi Lumo Knife, three chi and two cun long, shaped like a dragon inscription, and named it Dragon Scale.

(End of this chapter)