Bechtold T, Turcanu A, Geissler S, Ganglberger E
Institute for Textile Chemistry and Textile Physics, Leopold-Franzens-University Innsbruck, Dornbirn, Austria.
Bioresour Technol. 2002 Feb;81(3):171-7. doi: 10.1016/s0960-8524(01)00146-8.
Indigo is the most important blue component in the class of natural dyes for cellulose and protein fibres. In the moderate European climate Polygonum tinctorium Ait. could be an interesting source for natural indigo (Vat blue 1). Following a cultivation of the plant material a simple procedure for the extraction of the indigo precursor indican was investigated with regard to crop and quality of dye obtained. The dependence of the crop on the storage conditions of the harvested plant material was investigated. The results quantify the distinct sensitivity of the fresh material to the time of storage before extraction with regard to the amount of natural indigo obtained, the photometrically determined indigo content in the product and the shade and colour depth observed in standardised dyeing experiments. A basic set of data is presented, which describes the process in terms of consumption of energy, water and chemicals and organic waste released from the extraction step.
靛蓝是用于纤维素和蛋白质纤维的天然染料类别中最重要的蓝色成分。在欧洲温和的气候条件下，蓼蓝可能是天然靛蓝（还原蓝1）的一个有趣来源。在种植植物材料后，针对所获得染料的产量和质量，研究了一种提取靛蓝前体吲哚苷的简单方法。研究了产量对收获的植物材料储存条件的依赖性。结果量化了新鲜材料在提取前储存时间对所获得天然靛蓝的量、产品中通过光度法测定的靛蓝含量以及在标准化染色实验中观察到的色泽和色深的明显敏感性。给出了一组基础数据，这些数据从能量、水和化学品的消耗以及提取步骤产生的有机废物方面描述了该过程。
