The technique of making three papers in the lead mountain has been passed down for thousands of years. It is an ancient technique that was sublimated along with other bamboo paper crafts in the middle Tang Dynasty. In the "Tiangong Kaiwu" of Song Yingxing in the Ming Dynasty, the status of the papermaking of the lead mountain was recorded in many places, and the four papers of the lead mountain were highly praised. Even the four papers are made from the tender bamboos before and after the summer. They need to be exposed to the sun and rain for several months, naturally bleached, and the production process is complicated. All the experience is based on manual operation and the production cycle lasts for one year. Even the four papers have the reputation of "life paper millennium". After the Yuan Dynasty, many of China's great masterpieces and famous books were printed on four papers. Many calligraphy, prints, and extensions were also handed down. In the Ming and Qing Dynasties, if the literati and the famous painters of calligraphy and painting can get the authenticity of the Emperor's royal master, even the four papers are a great honor.

Even the four paper industry - Leading Mountain and four paper production techniques for the national intangible cultural heritage, lead mountain even four papers, also known as "Millennium Shou paper", was famous in the Song and Yuan Dynasties. The paper is made of tender bamboo as raw material and is made by 72 times of pure hand-made technology. The texture is white and dense, resistant to insects and heat, and never discolored. In 2006, even four paper making skills were selected into the first national intangible cultural heritage list. Leading Mountain and four papers are high-grade cultural papers, which are praised as “Shou Paper Millennium” for their advantages such as white and bright, delicate and dense, insect-resistant and heat-resistant, and never discolored. The first choice for repairing valuable ancient books. The paper is thin and uniform, white as sheep fat jade, vivid ink, easy to dry, easy to write, picture, printed book, clear and eye-catching, long-sighted and not tired. It is used for book writing, inking and dizzy, and it is a favorite of domestic and foreign painters. In particular, its distinctive characteristics are used for the best of the inscriptions, stone carvings and printed art. Therefore, it is widely used in line printing, ancient books restoration, printing, painting, monument, fan, and calligraphy. The manufacturing process is purely manual operation. The so-called "sheet paper is not easy to get, and the handle is seventy-two". It takes 72 steps, such as bamboo paper material production, paper material bleaching, and paper pulp papermaking, which lasts for more than one year. Natural bleaching, without chemical additives, helps to maintain good durability and whiteness of the paper, and avoids environmental pollution caused by industrial bleaching. It is a true green low carbon environmentally friendly product.

The technical requirements for the quality of the lead-and-battery four papers 1. The raw bamboo of the year when the raw material preparation protection zone is 400-600 meters above sea level, the length of the broken strip is 3.5-4.0 meters. 2. Fermentation and silk production 1. Select the spring water with a pH of 7.0-7.5m to uniformly spray water in the well-stacked bamboo pile ponds. After about 60 days, after the milky white slurry has exuded from the bamboo section, it will be fermented for three days and then drenched. . 2. After 90-100 days of watering, the silk is made, the thickness of the green skin is reduced as much as possible, and the peeled bamboo silk is beaten and washed to reduce the yellow inside the bamboo. 3. When pickling, press 10 parts of raw lime to make the lime emulsified, and then fully impregnate the bamboo silk according to the ratio of 1 part of raw lime and 2 parts of bamboo silk. The pile is dense and tidy, so that it naturally heats up. Covers should be added to the winter fermenters. 4. Cook the bamboo silk, the pot is dense and more ventilated, and there will be no leakage phenomenon. The gas can be stopped after 5-6 hours, and the pot will be fired 12 hours after the fire. 5. Bleaching, bamboo stalks into yellow cake, size ¢ 30cm, thickness 1-1.5cm, pie-shaped garden, yellow cake on the bleached mountain field to dry, turn the cake once a month after the mountain, natural bleaching after 4 months When the white cake goes down, the impurities left on the bamboo cake must be removed. 3. Papermaking 1. Fully moisturize the white cake with water before beating. The second time, the impurities are removed, and the degree of beating is maintained at 18±1 degree. 2. Correctly master the amount of paper, use 1.2-1.5% with paper medicine; correctly grasp the weight according to the weight requirement of paper, and the required weight per square meter should not exceed ± 2 grams. Fourth, the paper 1. The pressing must be gradually pressurized, the time is controlled between 1-1.2 hours, and the wet water after pressing is controlled between 60-62%. 2. Strictly control the temperature of the baking surface, it is better to not exceed 60 °C, and place the waste paper in the baking process to prevent secondary pollution of the dust. V. Product main technical indicators Index name Unit index Quantitative g/m219.0+2.0 brightness%60.0 aging resistance brightness (whiteness) value drop%≤5.0PH value/≥7.5 Six, sensory index paper cotton tough, feel moist Soft, the paper surface is clean and clean, with a hint of bamboo curtain.

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Producers within the lead-production area of ​​the four-paper production area may apply to the Lead Mountain County Market and Quality Supervision Administration for the use of the “Special Mark for Geographical Indication Products”, which is reviewed by the Jiangxi Provincial Bureau of Quality and Technical Supervision and reported to the General Administration of Quality Supervision, Inspection and Quarantine for approval. Announced. The testing organization of Lead Mountain and the four papers is selected by the Jiangxi Provincial Bureau of Quality and Technical Supervision in the testing institutions that meet the qualification requirements.