Research article

Dyeing Wool Fabric with an Additive from a Plant (Rubia Tinctorum L)

Zulayxo Islamova1, a), Nabijon Nabiyev1, Shahboz Qoychiboyev1, Iroda Nabieva1

Online First: November 08, 2022

The object of the present study a bleached fabric object with a surface density of 96 g/m2 , a whiteness of 36.6% and a capillary content of 134 mm/h, consisting of 100% wool fibers, has been studied. Roe (Marena-Rubia tinctorum L.) root powder salts Na2HPO4, CuSO4, K2Cr2O7, FeSO2, Al2(SO4)3 were used as carcinogens to carry out the dyeing process. Dyeing of wool fabric samples was carried out according to the following technological sequence: wool fabric samples that have undergone finishing processes are treated for 60 minutes at a temperature of 90-950C in a solution containing 3-10% Marena and 2.5 g/l acid, relative to the fabric mass. 3% acetic acid is added to the dye solution and the process is continued for 10 minutes at the same temperature. The color characteristics of wool fabric dyed with marena were determined on a laboratory colorimeter under standard irradiation D65. To systematize color characteristics, the color circle system, a L.a.b. color model was used. Geographic coordinates - latitude, longitude and height, etc. L *, a * i b * color values provide information on where the color is located and all relevant information. The L * coordinate indicates the color brightness, C * - the color saturation, h - the color tone, a * - the presence of red or green, b * - the presence of yellow and blue. The color properties of all samples were determined at a wavelength of 360 nm. The possibility of producing ink color and yellowish-brick colors has been proven on the basis of practical experiments.