Abstract
The objectives of this study were to find an appropriate method and process for treating ma bamboo (Dendrocalamus latiflorus) with a chromium-free copper-phosphorous salt (CuP). The effects of the constituent ratios and concentrations of CuP as well as treatment conditions on the green colour protection were investigated. In addition, accelerated UV light fastness tests, indoor exposure tests, and outdoor weathering tests were also carried out to evaluate the colour fastness and durability of bamboo culms. The results demonstrated that an attractive green colour was obtained by treating ma bamboo with 1% CuP at 60 °C for 3 h, using a 60:40 ratio of CuSO4 to H3PO4 in an aqueous solution. Compared with untreated bamboo culms, the CuP-treated samples had the brighter greenish skin and also provided better green colour fastness. After 180 days of indoor exposure, the a* value was slightly increased from −5.8 to −5.4.
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