berberis thunbergii dc leaves as a natural dye for dyeing of wool yarn

Natural dye is getting popularity recently due to several advantages over synthetic dyes. the main advantage of the natural dyes is their environmentally-friendly nature and greenness. however, harvesting of some natural dyes may harm the source plant. so, finding natural dye sources which are usually considered as waste by-products of other industries and are produced in large quantities is of great importance. agriculture processing industries generate a large amount of organic waste that still contains coloring pigments. their sustainable use in dyeing of textiles will expectedly solve the problem of their disposal. in addition, the cost can be lowered by the use of by-products from agriculture and food industry, and wastes from forestry. agro-waste such as peels, shells, seeds, etc., are rich sources of pigments and natural dyes can be obtained from them. berberis thunbergii dc is known as ornamental barberry in iran, which is a small deciduous shrub with green leaves and turn red in the autumn. the dried leaves were used as a natural dye to dye woolen yarn. the effects of dye concentration, mordant concentration, ph of dyebath, and dyeing time on the color strength of dyed samples were investigated using response surface methodology. the results showed that increasing the dye concentration, mordant concentration, and dyeing time resulted an increase the color strength (k/s), while increasing the ph of dyebath decreased the k/s of dyed sample.

Berberis thunbergii DC leaves as a natural dye for dyeing of wool yarn

Natural dye is getting popularity recently due to several advantages over synthetic dyes. The main advantage of the natural dyes is their environmentally-friendly nature and greenness. However, harvesting of some natural dyes may harm the source plant. So, finding natural dye sources which are usually considered as waste by-products of other industries and are produced in large quantities is of great importance. Agriculture processing industries generate a large amount of organic waste that still contains coloring pigments. Their sustainable use in dyeing of textiles will expectedly solve the problem of their disposal. In addition, the cost can be lowered by the use of by-products from agriculture and food industry, and wastes from forestry. Agro-waste such as peels, shells, seeds, etc., are rich sources of pigments and natural dyes can be obtained from them. Berberis thunbergii DC is known as ornamental barberry in Iran, which is a small deciduous shrub with green leaves and turn red in the autumn. The dried leaves were used as a natural dye to dye woolen yarn. The effects of dye concentration, mordant concentration, pH of dyebath, and dyeing time on the color strength of dyed samples were investigated using response surface methodology. The results showed that increasing the dye concentration, mordant concentration, and dyeing time resulted an increase the color strength (K/S), while increasing the pH of dyebath decreased the K/S of dyed sample.