FIGURE 5. (a) Contour showing the effects of independent variables on the K/S, (b) Optimization of K/S value on the effect of
dyeing temperature and mordant calcium oxide concentration
Effect of Type and Concentration of Mordant and Dyeing Temperature on Colour
Strength (K/S) Value
Different types of mordant produces different colour shade on cotton dyed with natural dyes from noja leaf extract
which shown in Figure 9. Ferrous sulphate mordant gives darker colouring shade than the original colour without
mordant. While alum produce the original colour of the noja leaves extract, and calcium oxide gives a lighter shade
colour than the original colour without mordant.
