A bamboo toothbrush manufacturing method may include an operation of preparing raw materials, which selecting some of the raw materials as materials suitable for manufacturing bamboo toothbrushes on the basis of a vascular bundle ratio on the cross-section of each of the raw materials; a milling operation of processing the selected materials into the shapes of toothbrush bodies; a pretreatment operation of placing the materials, which have been subjected to the milling process, in an environment having a certain temperature range and a certain humidity range for a certain time range; a hot pressing operation of inserting the materials into a press die, and heating and pressing the materials; an operation of sanding and coating the materials; a drilling operation of forming a plurality of holes in a head portion of each of the materials; and an operation of planting toothbrush bristles into the plurality of holes.

Disclosed are a bamboo with single-sided densification on a bamboo inner layer, and a preparation method and use thereof. The method includes: placing the bamboo inner layer of the bamboo in an impregnation solution, and conducting an impregnation treatment to obtain an impregnated bamboo, wherein the impregnation solution includes water or a flame retardant solution; subjecting a resulting bamboo inner layer of the impregnated bamboo to a preheating and softening treatment to obtain a preheated and softened bamboo; maintaining a temperature for the preheating and softening treatment, while subjecting the preheated and softened bamboo to pressurization and compression to densify the bamboo to a target thickness, to obtain a compressed bamboo; and simultaneously subjecting a resulting bamboo inner layer and a bamboo outer layer of the compressed bamboo to a hot pressing and shaping treatment, and subjecting a resulting bamboo to cooling and depressurizing in sequence.

Methods and systems for self-flowing treatment of wood, bamboo or other porous materials do not require external pressure or complicated equipment. Treatment liquid flows through these porous materials through use of capillary action, the use of absorbent sheets, and differences in pressure. The treatment solution is more evenly dispersed throughout the materials.