"System, I want to sign in!"

As soon as it came into his mind, Xu Wen couldn't wait to shout loudly.

To be honest, Xu Wen's behavior does not mean that he is in a hurry, but it is a manifestation of his inner anxiety.

After all, there is really nothing I can do about the production of writing instruments.

[Congratulations to the host, you successfully checked in on the 27th day. 】

Normally, Xu Wen was quite interested in this emotionless sound, but today, this interest was completely gone, and his heart was filled with a rather anxious feeling.

[Here we come! Stop talking first and let me guess what your purpose is this time? 】

Soon, the system's voice appeared in Xu Wen's mind. Just when Xu Wen wanted to say something, the system directly stopped Xu Wen's behavior.

[I think you must have come here for the writing tools!]

The system pretended to be immersed in thinking, and then spoke with confidence.

"Yes, I came here just for the writing tools. I think you also saw the previous experiments through my eyes!"

After listening to the system's guess, Xu Wen not only showed no signs of surprise, but nodded as if he was used to it, directly exposing the system's trick.

[Um, don’t tell me if you’ve seen it through, I’ve already prepared a basic plan for you!]

[Actually, when I told you about the paper production process yesterday, I already guessed that you would have demands for writing tools, but I didn’t expect this moment to come so quickly. 】

After seeing his trick exposed, the system said with some embarrassment. In fact, the guesses given by the system were not seen through Xu Wen's eyes.

Instead, I made a guess based on yesterday's sign-in reward. After all, everyone said that a good memory is not as good as a bad pen, and sentences such as paper and pen should not be separated.

Therefore, after Xu Wen actually made paper, he would definitely try his best to find some ready-made writing tools.

However, in systematic scanning, this kind of ready-to-use tool that already exists completely in nature naturally does not exist.

"In this case, what kind of tools do I need to make?"

After hearing the system's explanation, Xu Wen immediately expressed his doubts.

[I think you can make pencils or brushes or something like that.]

[Besides, based on what I know about you, you seem to be very good at calligraphy! 】

Seeing Xu Wen's anxious state, the system spoke calmly.

It can be said that calligraphy is the only thing Xu Wen has persisted in since childhood. Although he is not a master of calligraphy, it is more than enough for Xiao Cheng.

"There is naturally no problem with the writing brush. As for the monkeys, I can explain it from the most basic aspects."

"But don't you think the writing brush is too troublesome? If you need to carry it with you, it might be inconvenient!"

Obviously, Xu Wen has fully considered the advantages and disadvantages of the writing brush as a writing tool.

There is nothing wrong with what Xu Wen said. As a writing tool, the brush is indeed very good, although not many people can write calligraphy with a brush now.

But the only fatal drawback is that the portability is too poor, and you need to carry a series of additional products such as ink.

[In this case, have you considered pencils? 】

The system nodded slightly, and felt that Xu Wen's idea was very reasonable. For an adult, the brush would be too complicated, let alone a little monkey without any patience.

In comparison, pencil became Xu Wen's best choice.

First of all, in terms of portability, pencils can be said to be many times better than brushes.

Secondly, things written with pencils can be modified repeatedly, and the original amount of paper is not very large, and it can be used repeatedly.

In this way, it is definitely a very friendly choice for the monkeys.

"But if you want to make a pencil, don't you need a metal material like lead?"

"Is it possible that this kind of material still exists near the camp?"

However, after considering the various benefits of pencils, Xu Wen still thought of a fatal key point, which is the raw materials needed to make pencils.

[Um, I would like to ask, who told you that lead is a necessary metal material to make pencils? 】

After listening to Xu Wen's words, the system instantly felt self-doubting, as if all its previous understandings were wrong.

"No, can pencils be made without "lead"? If "lead" is not needed, why does he call it a pencil?"

Regarding the system problems, Xu Wen just thought it was very funny, as if he had encountered a very mentally retarded Question 4.

Not just Xu Wen, I believe that in the minds of many people, the metal element "lead" is definitely the most important raw material for pencils.

[Brother, pencils are mainly made of graphite and do not use the metal element "lead" at all, okay? 】

[As for why this thing is called a pencil, don’t you think it is very similar to why there is no wife in the wife cake? 】

Seeing Xu Wen's matter-of-fact expression, the system said helplessly that he really didn't know why Xu Wen had such a stubborn concept.

"What? What are you talking about?"

"Pencils are made of graphite? Not lead?"

After hearing this, Xu Wen instantly realized the experience that the system had just experienced, which was to constantly question his long-standing cognition.

"Then why do adults and teachers say that biting a pencil can cause lead poisoning?"

At this time, Xu Wen seemed to be constantly verifying all his cognitions, constantly bringing out his fixed cognitions.

[Actually, the pencil lead is mainly made of graphite and clay. Lead, a metal element, is indeed toxic, but graphite does not have any toxins. In other words, the pencil lead does not have any toxicity.

】

[As for whether there is lead in pencils, it does exist, but it is not in the core, but in the colorful outer skin of the pencils you use.]
Chapter completed!