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How are bamboo products made? What are the techniques?

How are bamboo products made? What are the techniques?

Bamboo and wood products refer to products made by wood product processing factories using bamboo as processing raw materials. Most of them are daily necessities, such as bamboo baskets, bamboo sieves, bamboo strainers, bamboo dustpans, bamboo steamers, cooking brooms, bamboo dustpans, bamboo dustpans, bamboo rakes, baskets, bamboo shoulder poles, bamboo chopsticks, bamboo brooms, bamboo hats, bamboo plaques, bamboo backpacks, bamboo mats, bamboo mats, bamboo beds, bamboo stools, bamboo chairs, bamboo lounge chairs, chopping boards, mats, coasters, curtains, etc. In recent years, bamboo floors and bamboo furniture have become more popular. There are also some higher-value folk crafts such as bamboo carvings.

 

The selection of bamboo materials is very particular about making wooden handicrafts. Generally, we go into the mountains after winter and before spring when the weather is clear. We need to prepare two large iron pots, some caustic soda, bamboo knives, axes, rivets and other tools. It is best to choose bamboo that is more than two years old. Those that are too tender or too old are not suitable. When selecting bamboo, only five or six nodes in the middle of the bamboo should be selected. Choose bamboo with a smooth surface, no scabs or injuries. After felling, we should also pay attention to protection. Once injured, there is no way to recover. For pen holders, we can choose the ones close to the roots and saw the length first. The length of the pen holder is generally about 12 cm. It is not easy to use if it is more than 15 or 16 cm. The armrest material can be as long as possible.After the bamboo is cut, immediately set up a pot, boil water, add caustic soda, and simmer for a long time on low heat, just like Cantonese people make soup, during which they constantly scoop out the bamboo juice on the water surface. After a few hours, take out the bamboo tube and bamboo slices while they are still hot, wipe off the bamboo juice on the surface, and immediately put them into another pot of boiling water to continue cooking. Each pot takes about three hours. After the time is up, don't rush to take it out. Wait until the water gradually warms up, then wipe the surface clean, and cover the side with bamboo skin with thick paper to protect it from scratches. Each time you cut bamboo, try to take as much as possible, because the loss will be greater later, and the focus of material selection is
  1. The bamboo is more than two years old and the toughness of old bamboo is not good.
  2. The thickness of the bamboo wall should be moderate, the thicker the better.
  3. Protect the original green skin of the bamboo. If the green skin is damaged and cannot be repaired, it will cause color difference on the bamboo surface in the future.
  4. Timely splitting can release the tension of bamboo and allow the fibers to shrink.
  5. Control the boiling time. Put the bamboo slices into the pot as soon as possible after they are sliced. Do not wait until they are off the mountain to boil them. (Bamboo ware gets worms, cracks, and mold because it is not handled in time.)
After cutting bamboo and returning home, spread it out to dry in the shade for several days, being careful to prevent moisture and mildew. Then take advantage of the winter sun to dry it! Dry it until the beginning of spring. If there are problems such as cracking during this period, discard it. After the beginning of spring. Store the bamboo that has been dried in the shade and store it in a cool and dry place, paying attention to ventilation. Take it out and inspect it every year. If it has been stored for more than three years and it is not damaged, it can be used without worry. Such materials are as hard and smooth as jade, and turn red with time. They are rare treasures.

 

A method for making patterns on bamboo products, according to the different layers of bamboo pieces used in the bamboo products, the first layer is scraped green (including first green), the second and third layers are second green, and different methods are used to make patterns respectively. The pattern making of the scraped green (including first green) bamboo product is to place the bamboo product flat in a magnetic field with a magnetic induction intensity of 0.5-1.5T, cover the bamboo product with an acid-resistant and deformation-resistant art mold (female mold) carved with various patterns, and use 5-65% (weight percentage concentration) of various concentrations of nitric acid to make the bamboo product.The pattern of the mold is sprayed with sulfuric acid or a mixture of nitric acid and sulfuric acid. The acid passes through the carved pattern seam of the positive mold and falls on the bamboo piece. The above acid can also be used to paint on the product directly without a mold. Then the temperature is controlled at 80℃-120℃ for 3-5 minutes to make the acid and bamboo fiber undergo esterification reaction, so that the bamboo product shows a beautiful pattern of different shades that does not fade. The pattern of the second green bamboo product is made by placing the bamboo product flat in a magnetic field with a magnetic induction intensity of 0.5-1.5T.Use corrosion-resistant art molds (positive molds) carved with various patterns to cover the Erqing bamboo products, and then carry out the following processes: a. Spray 1% (weight percentage concentration) of sodium dioctyl sulfonated succinate fast penetrant on the entire bamboo product and the mold; b. Then spray a highly corrosive acidic or alkaline or salt solution, and the solution concentration depends on the pattern requirements; c. Spray the color fixing agent hexahydro-1,3,5-triacryloyl triazine (concentration is 1% by weight); d. Spray nitro lacquer; e. Remove the mold to obtain a pattern with a dark surrounding and the pattern of the original color of the bamboo (mat) product.

 

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