ABSTRACT

Natural dyes are highly promising alternatives; however, their use has some drawbacks such as low light fastness, color yield, and repeatability. The objective of this study is to improve the light fastness of natural dyes. For this objective, wool fabrics dyed with pomegranate peels were subjected to different chemical treatments and UV curing. An important conclusion of this work is that UV curing can significantly increase the light fastness of the fabrics dyed with pomegranate peels. Moreover, different chemical processes including optical brightening have exhibited a positive effect on the light fastness of the samples. As an example, UV light exposure of the fabric, which was mordanted with copper sulfate and treated with TiO₂, resulted in an increase of the light fastness from 4–5 to 7.

摘要

天然染料是很有前景的替代品；然而，它们的使用有一些缺点，例如低耐光性、颜色产量和可重复性。本研究的目的是提高天然染料的耐光牢度。为此，用石榴皮染色的羊毛织物经过不同的化学处理和紫外线固化。这项工作的一个重要结论是紫外线固化可以显着提高石榴皮染色织物的耐光牢度。此外，包括荧光增白在内的不同化学过程对样品的耐光性有积极影响。例如，用硫酸铜媒染并用 TiO ₂处理的织物在紫外线照射下，使耐光牢度从 4-5 提高到 7。