Dyeing Fabrics by Using Extracts from Mulberry Branch/Trunk 1. Dyeability and Fluorescence Property

Abstract

The dyeing of wool, silk, cotton, ramie, nylon, acrylic and polyester fabric by using the extracts from mulberry branches and trunks was tried and the dyea-bility was studied. While the dyeability of the ethanol-extracts from mulberry is low, that of the water-extracts is high for wool, nylon and silk fabrics. They are dyed brownish and yellowish colours. The obtained colours depend on the extracts concentration in the dye solution, dyeing time, dye solution pH and dyeing temperature. Wool, nylon and silk fabrics are dyed deeper with an increase in the dyeing temperature. The mulberry extracts show fluorescence and reducing property. The results indicate that the mulberry extracts contain flavonols such as morin, kaempferol or quercetin, which form complexes with Al 3+ and show fluorescence. The wool treated with the mulberry extracts or AlCl 3 /mulberry extracts shows fluorescence with ultraviolet light irradiation.