Acid treatment for color method.
The chemical treatment of bamboo products with strong acid can make the bamboo products bronze. This treatment method belongs to the category of chemical staining. After this kind of coloring treatment, products made from bamboo and bamboo pellets are of antique and unique ethnic flavor.
Take 100kg of clear water, sulfuric acid (H2SO2) or nitric acid (HNO) 1kg, and mix the solution in an acid-resistant container. Soak bamboo products such as bamboo stalks or bamboo granules in the acid solution for 10-15 minutes, and then put saturated lime aqueous solution. Neutralization treatment is carried out for 30 to 40 minutes. After removal, rinse with water and allow to dry before use. The control of the color shade of the product can adjust the concentration of the acid and the time the product is soaked in the acid.
Whether using physical or chemical dyeing methods, bamboo products can obtain bright colors. In order to achieve satisfactory results during the dyeing process, bamboo products must pay attention to the following matters during operation.
1 During the operation, it is necessary to constantly flip the product to ensure that it is fully in contact with the solution;
2 The concentration of the solution must be accurate, and the dyeing time must be the same. Otherwise, the products dyed in different batches will have different shades of color. The reusable solution should be supplemented with appropriate chemical drugs.
3 The coloring acid is very corrosive, so the coloring time should not be too long, otherwise it will damage the bamboo fiber and reduce the strength of the product. Pay attention to safety during operation, and do not let the skin and clothing contact the liquid.