Pretreatment process steps for bamboo products
30 July 04

In order to use bamboo materials rationally and make full use of the characteristics of bamboo to make the bamboo furniture rich in color and style, it is necessary to cut, deoil, correct, polish, bleach, dye or artificially streak the bamboo before production. These are collectively referred to as For bamboo processing.

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1, bamboo section interception


According to the size of bamboo furniture, the bamboo section cut to the appropriate length is called bamboo section interception. During interception, it should be noted that according to the different structures and parts of the bamboo furniture, different lengths and the number of sections taken are taken.


2. Deoiling of bamboo segments


Bamboo contains a certain amount of water, sugar, starch, etc. These substances are collectively referred to as "bamboo oil." The bamboo segment was heated at a high temperature to allow the "bamboo oil" outflow to be called deoiling. There are two methods of deoiling, namely, fire cooking and cooking.


3, the correction of curved bamboo segments


In the process of growth, bamboo stalks are affected by various external factors and tend to bend. The bent bamboo must be corrected before it is suitable for making furniture. The method can be used to tune the song, adjust the song and other tools. The curved section of the dried bamboo section is placed on the fire to warm it. When the turd bark seeps out the peristaltic bamboo oil, the bamboo section gradually loses its elasticity. Then one end of the bamboo section is put into the adjusting stick groove, and the curvature is slowly adjusted. , and then cooling with cold water or wet cloth cooling.


    4. Polishing of bamboo segments


Bamboo section skin can be polished to enhance the gloss. The method is to put the processed bamboo section in water and use 2 pieces of fine sand and 1 piece of rice hull to mix and polish the bamboo section. The bamboo stalks that have just been harvested are ground first, then dried and then deoiled. The skin is particularly smooth and beautiful. Bamboo stalks with many black spots can be sanded directly.


5. Bamboo bleaching


The skin of the bamboo segment was originally yellow-green, gradually showing a bright yellow after deoiling and drying, and it was yellow-brown for a long time. If bamboo furniture or bamboo utensils require other colors, bamboo must be bleached, otherwise it is not conducive to coloring.


6. Bamboo section dyeing


If the bamboo section is dyed with appropriate colors or stripes, the re-finished furniture looks simple and elegant and more beautiful. Bamboo coloring more basic dyes. The method is to choose bleached, non-destructive bamboo segments, placed in 2% caustic soda or sodium carbonate solution, boiled for 3-5 minutes and then removed, and then into the basic dye solution, boiled for about half an hour Get the colors you need.


7, the production of artificial bamboo, bamboo


After the bamboo segment has been polished, it is coated with a dilute sulfuric acid solution, and the surface of the skin is lightly burnt. Such as dilute nitric acid solution, brown after the fire. The shade of color depends on the size of the acid concentration, that is, the greater the acid concentration, the darker the color, and the thinner the acid concentration, the lighter the color.