"The stress of your glass is caused by heating, so let's make a piece according to the usual one, measure it to see which temperature range produces the most stress, and then anneal it in this temperature range. ”

Standing in front of the stove, Im ordered Kaichi to arrive.

Jia nodded to understand that when the raw materials were ready, she would start making glass. Suddenly, something occurred to him, and he asked, "Teacher, how do I know what the current temperature is?" ”

Imu was stunned for a moment, only to realize that he hadn't taught him how to measure the temperature yet, and that Jiayi was usually so mature, he thought he would have done it a long time ago.

"I forgot, I'll teach you the magic of measuring temperature first. This magic is actually a ruler, which senses the temperature through mental power, and then through the transformation of magic, the temperature can be marked. ”

"Isn't that going to be a double magic? I'm going to maintain both the 'Mage's Touch' and the thermostat magic, can I?"

He had also tried to cast a double-open spell when he first learned the Mage's Touch, but the two tentacles could only do one thing at the same time. The kind he plays Warcraft and sends troops, and he can only control one line of troops, and he can't even control heroes and minions separately. So even if it's a simple computer, he didn't win, and then he never played again, only playing the dota map, and it had to be the IMBA version...

"You'll know when you learn it, it's simple. "Imu is full of confidence in Jiayi.

But Jia Yi also has a sense of crisis, every mage can be said to be, one in a thousand, one in a thousand, they are no worse than Jia Yi as a traverser, the only difference is probably that they have not experienced the influence of the Internet tide, have seen various routines, and there are 16 years of study career.

If you can't practice some relatively high-end skills and improve your competitiveness, let alone become a CEO, win Bai Fumei, and reach the peak of your life, it's good not to be eliminated.

"Don't be proud, you're not the protagonist. Kaichi admonished himself.

This magic of measuring temperature is called temperature perception, and it can't even be counted as a magic, strictly speaking, it is an application of mental power. Mental power is very sensitive, and with the change of temperature, there will be subtle changes in mental power. But this change is very subtle, unless the temperature change is very drastic.

Temperature perception amplifies this change, and it quantifies this change and feeds it back directly to the mage.

Jia Yi learned this magic on the same day, as long as his mental power is up to the standard and he can use it proficiently, it is still very easy to learn.

The form of this magic in the mind is especially like NDA, with multiple rune spirals intertwined. Jia Yi passed a wisp of spiritual power through the rune and probed it to the cup in front of him, he instantly felt that the rune fed back a quantified temperature, which was completely different from the thermometer, he obviously didn't see anything, and he didn't have a virtual thermometer in his mind, but he completely understood the temperature of the cup.

This magic not only magnifies the change in temperature, but most importantly quantifies it. It is also used to express the temperature limit of the ice-water mixture and the boiling temperature of the water, which is the same as Celsius.

After learning temperature perception, Jiayi did not rush to test the stress relief of glass, and both Yimu and himself felt that they needed to be familiar with it and use it more proficiently.

After learning this magic, it is like carrying a thermometer with you, and it is an all-round thermometer, which can measure the temperature of anything. Kaichi felt that he was curious about the temperature of everything, and no matter what he saw, he would first throw a temperature perception over and measure the temperature.

He still remembers that once his brother bought a thermometer, a thermometer, a mercury one, and at that time the gray canon was raging and everyone was nervous. The thermometer reading was skillful, and he had only seen it used by the doctor at that time, and he didn't know that he needed to find the right angle to read it correctly. After he measured his body temperature with a thermometer, he couldn't see the specific value, he thought that the thermometer was broken, or the temperature of his body was not obvious enough, so he didn't measure it. Then, he took a freshly cooked corn, put a thermometer on it to measure it, and then it exploded.

After his brother taught him how to read, he looked at it, and the temperature was 42, to the top...

The next day, after Imu and Kaichi had re-prepared, they began to make glass again.

Kaichi first melted the raw material to make a glass liquid, and then he took out the liquid glass and molded it into a flat plate. At this time, Imu began to sense the stress changes in the glass.

The stress in the glass changes every time the temperature drops, and Imu records the change of stress at each temperature in detail, and the stress does not change linearly with the temperature. When the glass first begins to condense, the residual stress is the most, and as the temperature decreases, when it reaches about 550 degrees, the residual stress accumulates the most. After this temperature point, the temperature of the glass continues to drop, although the stress also increases, but when the glass is completely cooled, it will gradually fade.

After repeating it twice in a row, Imu recorded the stress change in the glass and gave it to Kaichi: "This is the stress change table in the glass, and according to this record, it is actually possible to use magic without using it." When the glass is solidified, you can maintain this temperature for a period of time, so that the temperature of all places inside and outside the glass is consistent, and it can be kept warm for about half a standard hour. After the insulation is completed, you are slowly lowering the temperature to about 10 degrees every quarter of an hour for the current size glass, which should ensure that most of the stress residue is removed. ”

Kaichi asked, "Why can I do it without magic?"

"As long as you cool down slowly enough and aren't afraid to waste time. When annealing, I am afraid that the temperature changes too quickly, and it doesn't matter if it is slow. ”

With magic, it's just a matter of being able to control the temperature changes and make annealing more efficient. It would be convenient if he could use magic to relieve stress directly, but unfortunately Imu didn't learn it.

With Imu's guidance, Kaichi was finally able to make the right glass. But first, he asked Yim to build a new furnace for annealing.

Because the temperature needs to be lowered slowly during annealing, the original furnace is not very suitable, and the high-temperature furnace can be heated, but it is a little difficult to control the temperature to decrease slowly. And if it is annealed directly in it, then every time you make a piece of glass, you have to turn off the flame once, which is too wasteful.

But it takes time to build a new stove, and in fact Imu hasn't had much to spare lately. He's been busy with the Purification Circle, and he's thankful that he's able to find time to help Kaichi deal with the stress. One is that he has been too busy lately, and he needs to take a break and change his brain, and the second is that he really loves Jia Yi.

But it was impossible for Im to put aside what he was doing to build a furnace for Kaichi. Mages, in the end, are all self-oriented, even if it is Jiayi himself, he will not put other people's affairs ahead of himself.

Now that there is no furnace, Jiayi's original idea of making flat glass is not suitable, the cost performance is too low, he began to make some glass "crafts" in the high-temperature furnace, and then practice his craft first.