2. International Congress on Wool and Luxury Fibres-ICONWOOLF 2022, Tekirdağ, Turkey, 20 May 2022, pp.1-5
Wool fabrics can be colored with synthetic dyes and even also with natural sources. To present a different aspect to the coloration of wool, the study was focused on a topping process (dyeing of wool which was already dyed) with different natural dye sources. For this purpose, the fabrics that were already dyed with a natural dye source were once again dyed with two different natural dyes. For bottom dyeing (bottoming), fabrics were dyed with hop (Humulus lupulus L.) in presence of different mordanting agents. Then the dyed, washed & dried samples were once again dyed (topping) with two different natural dye sources. For topping; the powdered madder and acorn were tested in direct dyeing of wool samples. Finally, the color changes were analyzed with the use of a spectrophotometer.
The study exhibited
that such a process (bottoming with hop
in presence of different mordanting agents and then topping with madder or
acorn) can be a way to obtain different shades and colors by natural dyeing.