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- Title
Dyeing treatments for protecting colour and colour fastness of green bamboo culms.
- Authors
Chung, Min‐Jay; Cheng, Sen‐Sung; Lee, Chia‐Ju; Chang, Shang‐Tzen
- Abstract
The effects of various dyestuffs and treatment conditions on the epidermis colour of ma bamboo ( Dendrocalamus latiflorus), moso bamboo ( Phyllostachys pubescens), and makino bamboo ( P. makinoi) were examined to determine the most appropriate dyeing material and approach for endowing bamboo culms with a fascinating green colour without removal of their epidermis. Experimental results revealed that excellent green colour was obtained when the three species of bamboo culms were treated with 0.25% basic dyes in an 80 °C water bath for 30 min ( a* values of −19.6, −15.4, and −16.0, respectively). Moreover, alkali pretreatment, though contributing to dyeing effectiveness, yielded bamboo culms with dim surface lightness of low L* values. Dye makino bamboo culms without colour fixation post-treatment changed from green to light green after indoor exposure for 1 year, exhibiting unstable indoor colour fastness. In contrast, colour fixation post-treatment was found to improve colour fastness of bamboo culms; in particular, treatment with 1% glacial acetic acid or 3% tannic acid achieved more uniform dyeing effectiveness and better indoor fastness. By inhibiting discoloration, the natural beauty of bamboo culm can be preserved and its service life can be extended.
- Subjects
DYES &; dyeing; BAMBOO; PHYLLOSTACHYS pubescens; TANNINS; ACETIC acid
- Publication
Coloration Technology, 2017, Vol 133, Issue 4, p305
- ISSN
1472-3581
- Publication type
Article
- DOI
10.1111/cote.12279