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Lu Huang looked at Tang Zheng and did not answer.

But Tang Zheng doesn't need to answer - now, of course, only now!

His heart also suddenly tightened.

You know, this is a casting master like Lu Huang, a hand-in-person teaching opportunity on the spot, speaking of which, I am afraid that even the casting lecturers of the top schools of the major families will have to break their heads!

Tang Zheng was not hypocritical, and put away the casual smile on his face: "Please also ask the master for advice." ”

Lu Huang smiled and nodded, and continued sentence by sentence......

"Stone pressing method, you should also know, is a process of removing mineral impurities, separating effective raw materials, and then purifying."

"The whole process of purification is divided into four steps: inspection, grinding, purification and purification!"

"Sorting is the process of using star power to sense the type and internal structure of the ore, and figure out which part of the ore you want to extract in the end."

"Grinding is rough processing, which removes the parts with the most external impurities from the ore, leaving only the parts where the essence needs to be extracted."

"Purification is refining, further removing all the useless impurities in the minerals, leaving only the essence."

"Pressing is the last step, dividing the mineral essence; Leave and transform into the materials you will eventually need. ”

"Of these four points, the first step is very important, it determines the goal and details of your final treatment, and many people ignore this point, thinking that only the last three steps are more technically demanding. It's more important, but it's not...... Of course. Selection is a very experience-based step that cannot be achieved overnight. ”

"Now. You'll see me show you the whole process first. ”

Lu Huang briefly explained to Tang Zheng the process of stone pressing, and also took a palm-sized gravel on the ground at random.

"Let's start with the selection first. I use star power to constantly explore the inside of this stone, feel its density, structure, and resonance properties with star power......" Lu Huang said as he transported the star power and extended it into the ordinary stone in his hand.

I saw that the star power slowly sank into the stone, and a very faint line of star power gradually lit up on the stone, like the capillaries of the human body. Small and complicated, walk on the entire surface of the stone.

The inside of the raw material is uneven, even if Lu Huang extends the star power into the raw material, he is very careful......

"Taiyin affinity, amorphous porous structure, more impurities, high refractory ...... I'm going to crush out the Taiyin Yuan Iron in this stone. After Lu Huang used star power to select the stones, he came to a conclusion.

Then, he snapped his fists together!

And he saw that the stone was pinched in his hand. With a slight twist of his fingers, debris fell from the stone.

Soon, the stone was a big circle smaller.

The original irregular shape has also become a smooth little goose egg!

"The process of grinding. Pay attention to the three words of fast, accurate and ruthless, move fast, and go to miscellaneous to be accurate. Grinding should be ruthless. After Lu Huang demonstrated the grinding, he explained the grinding tips to Tang Zheng.

And then...... It's purification. Purification should be pure and pure, condensed but not dispersed. And then. Lu Huang's star power continued to stretch out, and the cobblestone block once again lit up with star power veins.

It's just that this time the light is much brighter than before, and the veins are thicker and denser, and they have evolved from capillaries to the point of aorta.

The star power flowed slowly on the stone, and the pebble seemed to swell up entirely......

Lu Huang opened his mouth and blew lightly, and a light smoke of stone powder floated from his hand, leaving only the veins that were still flashing with the glimmer of star power.

Lu Huang's fingers moved slightly, those veins slowly fused, and the star power slowly faded.

Then, in his hand, he left a small piece of his body shimmering with a silver-black metallic sheen.

"The last step, under the pressure, under the pressure, the good material is born!" Then, more and more star power poured out of Lu Huang's hand, gradually completely enveloping the entire stone that was only a small piece left.

The star power that enveloped the stone became more and more dazzling, as if it was about to completely crush the small piece into the palm of his hand.

In the end, Lu Huang withdrew the star power.

What remained in his hand was only a grain of iron the size of a grain of rice, shining with a sharp and cold light!

"Taiyin Yuan Tie, it's done." Lu Huang glanced at the iron grain to Tang Zheng, and then said: "This place is worthy of the main star polar region, and most of the surrounding stone mines have been contaminated by star power all year round, and their properties have changed. Even the stone that could only purify ordinary cold iron on one side can be crushed to produce Taiyin Yuan Iron, and this small grain can be worth half a purple gold treasure. ”

"......" Tang Zheng looked at the small iron particles in Lu Huang's hand, and his eyes were slightly hot.

Such a small grain of Taiyin Yuan Iron can be worth half a Zijin Tongbao, which is really "turning stones into gold"!

If you practice the "Stone Pressing Method", then it will not be a daily increase in money, and the wealth will be rolling in......

"Rub, why did you think about making money again? Chop your hands, chop your hands! Tang Zheng said to himself.

"Alright, you can try it yourself." Lu Huang motioned for Tang Zheng to start trying.

Tang Zheng took the stone in his hand and silently went through Master Lu Huang's explanation and demonstration in his heart.

He took a light breath and ran the star power down his fingers, trying to extend it into the ordinary stone.

When watching Master Lu Huang's demonstration, it was extremely easy, but when he really tried it himself, Tang Zheng found that even if it was just this step, it was extremely difficult.

This ordinary stone simply has no star power resonance at all!

As soon as Tang Zheng's star power extended to the surface of the stone, he was immediately met with great resistance, and it was difficult to advance at all.

"No wonder as the saying goes, the stubborn stone nods, it is difficult to climb to the sky." Tang Zheng's first attempt was blocked, but he just laughed at himself, not discouraged at all.

He recalled the flow of star power when Master Lu Huang used star power to check, and his heart moved, no longer using brute force to forcibly extend the star power inside, but turning the star power into a trickle.

"Water is impermanent, turn the star power into flowing water, try slowly. Slowly infiltrate ......" Tang Zheng changed the way of star power extension, and finally achieved good results.

Though. Compared to the speed of Master Lu Huang's selection, it is not the same. But there has been tremendous progress compared to before.

Slowly, under the infiltration of Tang Zheng's patient star power, his star power gradually penetrated deep into the stone.

"It's still too yin affinity, well, it seems to be a crystalline structure, not a metallic ......" With the entry of star power, it senses the route and speed of the flow of star power. The internal structure and impurity distribution of the stone gradually formed a prototype in Tang Zheng's heart.

Finally, just as Master Lu Huang demonstrated, the surface of the stone in Tang Zheng's hand also lit up with a small vein of star power, flickering with a faint star power light.

"Whew......" Tang Zheng's head was already covered with fine beads of sweat, but he didn't care about wiping it at all, and his mind was already thinking about the next step of grinding.

……

Follow Master Lu Huang's demonstration. The two steps of grinding and purifying, with Tang Zheng's powerful star power control power, did not cause much hindrance to him.

The only problem is that Tang Zheng is now like a layman who peels fruit for the first time. The movements are also very unskilled.

Therefore, in the process of grinding and purifying, a lot of originally useful minerals will be used. It's also abandoned.

Looking at the essence stone in his hand that was only the size of a fingernail, Tang Zheng smiled. The last and most difficult step began - the pinching.

Purify. In Tang Zheng's understanding, it is to use star power to create a high-pressure environment, change the internal structure of the material, and finally change the properties of the material.

"Tsk, that's how you turn carbon into diamonds!" Tang Zheng recalled the main point of the pressure and couldn't help complaining.

Like Lu Huang, a large amount of star power poured out from his hand, completely enveloping the stone essence in his palm.

Tang Zheng used his star power, constantly shrinking the star power in his palm......

Shrink, shrink, shrink again!

Tang Zheng clenched his teeth, and all his attention was placed on the big nail in the palm of his hand.

Beads of sweat the size of beans were dripping down his face.

However, he obviously felt that the pressure was still not enough, so he could insert that kick in the door, and he could transform the essence stone in his palm into a high-quality crystal material with a tighter structure and a more neat arrangement.

Pity......

Tang Zheng even used the strength to eat milk, but he still couldn't finish it.

"Strength is a hard injury!" Tang Zheng once again felt that the quality and total amount of star power were not enough, and even the casting was greatly affected.

What to do?

Give up and get a new stone that is a little easier to crush?

Tang Zheng's heart was a little entangled......

Giving up halfway is definitely not Tang Zheng's style, as soon as he gritted his teeth, a flash of inspiration suddenly flashed in his head.

"The magnitude of the pressure is related to the force area and the pressure itself, when the pressure is constant, the smaller the force area, the more significant the effect of the pressure...... this introductory physics knowledge flashed in Tang Zheng's mind.

Tang Zheng decisively condensed the star power, gathered like a needle, and began to press the stone essence in his hand from all sides at the same time.

And it worked!

Feeling that the stone essence that was originally immovable, the volume was finally suppressed a little bit, Tang Zheng was determined in his heart, and then patiently compressed the volume of the stone essence little by little, and he could obviously feel that the nature and texture of the stone essence were changing accordingly.

"Hah, it's done!" I don't know how long it took, Tang Zheng's heart moved, put away his star power, and a small transparent crystal lay in Tang Zheng's palm, shining.

"Perfectly cut, eight hearts and eight arrows, flawless ...... under the mirror" Tang Zheng looked at the crystal in his hand that was as thin as a grain of sand, and said intoxicatedly.

Holding the sand-like crystal in his hand, Tang Zheng handed it to Lu Huang: "I'll start dealing with the Fubi Broken Chenshi now?" ”

"......" Lu Huang glanced at the crystal in his hand, and then at Tang Zheng, "I can barely know the basic method of suppressing purity......

"Huh?" Tang Zheng was stunned for a moment, he thought that he was a genius and could learn it, but he didn't think that before he had time to be proud, he was poured down by a scoop of cold water - he could only be regarded as "barely knowing" after a long time.

"Well, you've taken the first step towards the Purification Method, which is very good." Lu Huang threw a few more broken stones over, "Your foundation is very good, let's continue to practice!" ”.

(To be continued......) R1292