Abstract：
In recent years, consumer preferences have begun to turn back to natural dyes, whereas synthetic dyes have been pushed into the background over the previous 60 years. This is a result of increased knowledge of the potential hazards associated with the creation of synthetic dyes, which use raw materials derived from petrochemicals and involve intense chemical interactions. Such dyes need a lot of energy to produce, and their negative effects on the environment increase pollution. It has been discovered that several of these dyes, particularly the azo-based ones are carcinogenic. On the contrary, natural dyes are getting more attention from scientists and researchers as a result of their several advantages like being eco-friendly, biodegradable and renewable, sustainable, available in nature, having no disposal problems, minimizing the consumption of fossil fuel, anti-bacterial, insect repellent, and anti-allergic, anti-ultraviolet, intensify dyeing and finishing process efficiency, less expensive, and no adverse effects on human health and environment. However, there are also some drawbacks, like poor fastness properties, natural dye printing for bulk production, difficulties in reproducibility of shades, and so forth. Despite all these limitations, the demand for natural dyes is increasing significantly in textile industries because they offer far more safety than synthetic dyes. This study provides an overall concept of the natural dyes in textile printing. It illustrates parameters of printing performance, methods, and techniques of extraction of natural dyes, printing methods, and printing of natural and synthetic fibers. Finally, this study describes the challenges and future prospects of natural dyes in textile printing.
摘要：
近年来,消费者的偏好已经开始转向天然染料，而在过去的60年里，合成染料被推到了背景中。这是由于增加了对与合成染料产生相关的潜在危害的认识，它们使用来自石化产品的原材料，并涉及强烈的化学相互作用。这种染料需要大量的能量来生产，它们对环境的负面影响增加了污染。已经发现，这些染料中的几种，特别是基于偶氮的是致癌的。相反,天然染料越来越受到科学家和研究人员的关注，因为它们具有环保等优点，可生物降解和可再生，可持续,在自然界中可用，没有处置问题，尽量减少化石燃料的消耗，抗菌,驱虫剂,和抗过敏，抗紫外线,提高染整加工效率，更便宜，对人类健康和环境没有不利影响。然而,也有一些缺点，像差的牢度性能，天然染料印刷批量生产，阴影再现性的困难，等等。尽管有这些限制,纺织行业对天然染料的需求正在显著增加，因为它们比合成染料安全得多。本研究提供了纺织品印花中天然染料的整体概念。它说明了打印性能的参数，方法,和天然染料的提取技术，印刷方法,天然和合成纤维的印刷。最后,本研究描述了天然染料在纺织品印花中的挑战和未来前景。
