How to make paper?

Taking the bamboo paper making method recorded in the ancient book Tiangong Kaiwu in China as an example, this paper introduces the ancient paper making methods. In ancient times, the steps of bamboo papermaking were as follows: 1. Chop bamboo, float it in the pond, chop it, put it in the pond, soak it for more than 100 days, decompose it with natural microorganisms, and wash off the green skin of bamboo. 2. Cook the bamboo obtained above, put it in a "pot" and cook it with lime for eight days and eight nights. 3. Take the treated bamboo out of the mortar, put it in the mortar and beat it with the mortar until the bamboo is smashed and looks like mud. 4. Throw the cloth into the curtain. Pour the mashed bamboo material into the sink and swing the bamboo material in the water with a bamboo curtain. The bamboo material becomes a thin layer and sticks to the bamboo curtain, and the remaining water flows down the water tank from the four sides of the bamboo curtain. 5. Cover the curtain to press the paper, and then repeat the curtain to make the wet paper fall on the board, thus making a piece of paper. In this way, the steps of placing materials and covering curtains are repeated, so that thousands of wet papers are stacked, and the boards are added to squeeze out most of the water. 6. Bake the wet paper over the fire. The equipment for baking paper is to build an alley with adobe bricks and make a fire in the alley. After the temperature of adobe brick rises, wet paper is pasted one by one and baked. After drying, the paper is obtained by uncovering the cover. Modern papermaking methods Modern papermaking procedures can be divided into several main steps, such as pulping, preparation, papermaking and processing. Pulping is the first step in papermaking. Generally speaking, there are three ways to convert wood into pulp: mechanical pulping, chemical pulping and semi-chemical pulping. 2. The modulation of paper materials in the modulation process is another key point in papermaking, and the strength, color tone, printability and shelf life of the finished paper are directly related to it. The common preparation process can be roughly divided into the following three steps: a. beating B. beating C. adding glue and filling 3. The main work of the paper-making department is to evenly interweave and dehydrate the tissue paper, and then dry, calender, roll paper, cut, sort and pack it, so the common process is: a. Screen the paper, and then dilute the prepared paper to a lower concentration. B, the wire part makes the paper material flow out of the headbox on the circulating copper wire net or plastic net and evenly distribute and interweave. C, the press department introduces the wet paper with the net surface removed between two rollers with felt cloth attached, and further dehydrates the wet paper through the extrusion of the rollers and the water absorption of the felt cloth, so that the paper is more compact, thereby improving the paper surface and increasing the strength. D. Calendering Because the moisture content of the pressed wet paper is still as high as 52-70%, it can no longer be removed by mechanical force, so the wet paper is allowed to pass through the surfaces of many rollers with hot steam inside to dry the paper. E. Because the moisture content of the extruded wet paper is still as high as 52-70%, it can no longer be removed by mechanical force, so the wet paper is allowed to pass through the surface of many cylinders with hot steam inside to dry the paper. G. Cutting, sorting and packaging: take a plurality of rolls of paper whose front faces have been rolled into a cylindrical shape, cut them into thin slices with a paper cutter, manually or mechanically sort out the damaged or defiled thin slices, and finally pack every 500 sheets into a package (usually called a ream).