A pair of rattan armor is braided, the weight is relatively light, less than 20 catties, this pair of rattan armor is mainly used to defend the head and upper body, only half of the lower body is covered by the rattan armor, if it is completely covered, it will have a great impact on people's walking.

Su Yan personally experimented with this pair of rattan armor, piercing the rattan armor to a wooden stake, Su Yan took a stone spear, a stone axe, and a short spear to attack the wooden stake wearing the rattan armor, and the strength of each attack was different.

Soon, various scars were left on the rattan armor, and a pair of rattan armor was completely scrapped.

After many tests, Su Yan came to a conclusion that the defensive effect of this rattan armor is average, people wearing animal skin clothes plus rattan armor, in battle, the original death blow will make people seriously injured, originally seriously injured, with the rattan armor barrier will become a slight injury, if it is a slight injury, then the rattan armor will resist all the damage.

The effect of the rattan armor is like this, with the conditions of the dragon tribe, no matter how much it is improved, it will not be improved, but it is enough to have such an effect, and then use it with the rattan shield or copper shield, it is enough to allow the clansmen in the battle to avoid most attacks, and the probability of dying in battle is greatly reduced.

However, there is a prerequisite here, the dragon tribe is facing a primitive tribe that uses stone spears and stone axes, and if it encounters a tribe that uses metal weapons, I am afraid that the effect of rattan armor will be smaller.

It is still the best copper armor, you can use the copper armor to make a heavy armor of about a hundred catties, and the warriors of the dragon tribe wear such heavy armor, and they are absolutely invincible on the battlefield.

There is no opponent of the dragon tribe in the north for the time being, maybe there will be in the south, and the copper armor will also be cast in the future, Su Yan wrote down the matter of increasing the production of blister copper next year on the animal skin, and at the same time tried to refine the blister copper into pure copper, and finally developed from pure copper to bronze.

You know, bronze is better than early iron.

Rattan armor can be compiled in batches, so that some warriors in the tribe are equipped, this rattan armor is only used when the dragon tribe conquers other primitive tribes, there is no need to wear rattan armor when hunting, wearing rattan armor still affects the flexibility of people's bodies, and also affects the speed of people's travel to a certain extent.

The matter of rattan armor can be put down, Su Yan continued to devote himself to the next thing, and the next thing was a little troublesome, which was "papermaking".

Now the two most commonly used writing methods in the dragon tribe, one is to use sharp stones to carve on the stone slabs, mainly the witches of the dragon tribe depict various knowledge on the stone tablets, as the knowledge inheritance of the dragon tribe; The second is Su Yan's habit of using charcoal to write and draw on animal skins, the most important of which is the animal skin map.

According to the trajectory of history, the next way of writing is to use a knife to depict on the bamboo slips, followed by the brush and white paper, Su Yan decided to skip the knife and bamboo slips, and jump directly to the brush and white paper, compared to the bamboo slips, or white paper is more convenient, and Su Yan knows a little about the manufacturing process of white paper, and can try to make white paper.

China's papermaking history is very long, according to archaeological findings, during the Western Han Dynasty, China already had hemp fiber paper, the texture is rough, and the quantity is small, the cost is high, and it is not popular.

Until the first year of Yuanxing in the Eastern Han Dynasty, Cai Lun improved the papermaking technique, he used bark, hemp, cloth, fish nets and other raw materials, through frustration, pounding, frying, baking and other processes to manufacture paper, is the origin of modern paper, this kind of paper, raw materials are easy to find, and very cheap, the quality has also improved, gradually commonly used, in order to commemorate Cai Lun's achievements, descendants call this paper "Cai Hou paper".

After Cai Lun's improvement, a set of more stereotyped papermaking process has been formed, and the process can be roughly summarized into four steps:

The first is the separation of raw materials, that is, the raw materials are degummed in the lye solution by soaking or cooking, and dispersed into fibrous form;

The second is pulping, which is to cut off the fiber by cutting and pounding, and make the fiber broom, and become pulp;

The third is copying, that is, the pulp is soaked into slurry, and then the pulp is scooped with a paper grazer (mat), so that the pulp is interwoven into a thin sheet of wet paper on the paper grab;

The fourth is drying, that is, the wet paper is dried or dried, and when it is removed, it becomes paper.

After the Han Dynasty, although the process has been continuously improved and matured, these four steps have basically not changed, and even in modern times, in wet papermaking production, its production process is still not fundamentally different from the ancient Chinese papermaking method.

Su Yan understands the four steps of papermaking, so she is ready to try to make white paper.

Ten clansmen were found, and the paper-making project began.

The first step in papermaking is to choose raw materials: Cai Lun uses bark, hemp, cloth, fish nets, etc. as raw materials, which are all available in these dragon tribes, and papermaking raw materials will not be lacking.

In the second step of papermaking, the raw materials are processed: the bark, hemp, cloth, and fishing nets are chopped, washed, and then impregnated with lye to make them swell and soft.

As for the lye, it is good to use plant ash water.

The third step of papermaking, pulping: cooking, using the alkaline solution in the plant ash to remove the oil stains, pigments and other impurities in the raw materials, then rinsing and pounding with water, and stirring the mashed fine fibers into pulp with water.

It just so happens that the dragon tribe has a water mill, and this step is very labor-saving.

The fourth step of papermaking, paper forming: the pulp is fished out with a mat woven of bamboo strips, and after being dehydrated and dried, it becomes paper.

It took more than ten days, during which many problems were solved by Su Yan, and finally the first batch of paper was manufactured.

Su Yan looked at the rough, wrinkled and slightly yellowish paper in front of him, his brows furrowed, the paper is not pure white, it's okay, you can improve the papermaking process in the future, and completely wash away all the pigments, but the surface of this paper is rough and wrinkled, which is not very bad for writing.

"That's right." An idea flashed through Su Yan's mind, since the surface of the paper was rough and uneven, it could be flattened manually.

In ancient times, there was a technique called calendering, also known as calendering, that is, using oval, ingot-shaped or curved stones to crush or rub leather, cloth, paper, etc. to make it dense and shiny.

Su Yan found a few pebbles and personally calendered the rough paper, which became smooth little by little in Su Ya's hands.

Picking up this one-foot-square one, which had become flat and smooth, Su Yan's brows finally relaxed, and the rough paper looked very uncomfortable, but it was better to have this flat and smooth paper.

It can't be said that the rough paper is useless, it can be used as toilet paper, and it is unimaginable how people would wipe their butts in the era when there was no toilet paper.

However, there are not many people in the dragon tribe who are eligible to use paper as toilet paper, unless paper is produced on a large scale in the future.

Su Yan took the charcoal to write and draw on the flat and smooth paper, feeling that this paper was okay, at least much stronger than the animal skin, and using charcoal to write and draw on the animal skin, many times it had to be repeated several times to write clear traces.

It is said that the paper is smooth and smooth, but in fact it is impossible to be really smooth, and if that is the case, there is no way for charcoal to write and draw on this paper.