Use of Alkali in Traditional Dyeing Technologies with Plants
Ethnographic sources provide information about several dye plants that produced reddish colors; however, there is no information on how this process is accomplished. Combining information from written sources with the results of dyeing experiments enables a deeper understanding of the dyeing methods...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
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| Series: | Heritage |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2571-9408/8/7/264 |
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| Summary: | Ethnographic sources provide information about several dye plants that produced reddish colors; however, there is no information on how this process is accomplished. Combining information from written sources with the results of dyeing experiments enables a deeper understanding of the dyeing methods employed in the past. This paper gives insight into the effect of using alkali on obtaining reddish tones in dyeing with <i>Potentilla erecta</i> and <i>Rumex</i> sp. In dyeing experiments, wool yarn was dyed with plant extracts, and the chemical compositions were studied both in plant extracts and in extracts obtained from wool after dyeing. As a result, the red/red-brown color is obtained only under the influence of alkali. Analytical studies of procyanidin (PC) extracts from rhizomes and yarns were performed using infrared spectroscopy (FTIR-ATR) and liquid chromatography coupled with mass spectrometric detection (LC-DAD-MS). Procyanidin extracts of <i>P. erecta</i> and <i>R. acetosa</i> contained monomers identified as (+)-catechin and (-)-epicatechin, as well as dimeric procyanidins of type-A (<i>m</i>/<i>z</i> 575 [M−H]<sup>−</sup>) and type-B (<i>m</i>/<i>z</i> 577 [M−H]<sup>−</sup>), along with various types of trimers (<i>m</i>/<i>z</i> 865 [M−H]<sup>−</sup>; <i>m</i>/<i>z</i> 863 [M−H]<sup>−</sup>), which were also isolated from dyed wool yarns with a similar composition. The conducted research on the use of alkali with tannin-containing plants contributes to deepening our understanding of the perception of color that existed in the ancient rural environment. |
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| ISSN: | 2571-9408 |