Browsing by Subject "nokkosella värjäys"

The aim of this study was to examine the dyeing properties of dried nettle stems and evaluate the color fastness. The purpose is to find out the possibilities of nettle dyeing on a larger scale. This study contributes to the larger BioColour project, which seeks to develop a comprehensive palette of natural dyes. Nettle has been traditionally utilized in the fiber industry. It is also widely acknowledged for its therapeutic qualities, having demonstrated efficacy in treating anemia and burns. Furthermore, nettle is acknowledged for its high nutritional value; however, research regarding its use in dyeing remains scarce. Ensuring the Earth maintains its carrying capacity requires prioritizing sustainable development and circular economy goals. As a key step towards this, developing less toxic dyes to replace the ones that threaten the environment and human health is imperative. The current study was framed as an experimental investigation, wherein stem extracts from the nettle plant were utilized to create dye baths for colouring a variety of textiles such as cotton, bamboo, and wool. Before the dyeing process, the fabric samples were subjected to pre-treatment using both organic and synthetic tannins, iron, and alum. Furthermore, a subset of samples was left untreated to assess the impact of different pre-treatments on resultant colour vibrancy and resilience. After dyeing, the samples were subjected to standard colour-fastness assessments, including colour-fastness tests for washing, rubbing, and light, and were also visually evaluated using a grayscale. Additionally, colour measurements were captured using a CIELAB colour measuring device, and the acquired data were analysed and interpreted using both qualitative and quantitative methodologies. Various shades of light colors were successfully produced using cotton and bamboo viscose alongside nettle. However, the merino wool displayed a darker shade. The samples with iron mordant, organic, or synthetic tannin mordant, resulted in significantly deeper color than those treated with 0-mordant and alum. Remarkably, in the washing fastness test, colors remained well preserved with commercial detergent compared to the standard variant. Similarly, abrasion fastness yielded favorable results, except wet rubbing on wool. In contrast, lightfastness testing revealed the least favorable outcome for samples with 0-mordant and alum. The study highlights the prospective value of using natural dyes for nettle dyeing.