In this study, wool fabric was mordanted with alum, copper, or tin, and then dyed with cochineal. Adsorption equilibrium and kinetic studies were conducted at several temperatures to determine mordant effects. The Freundlich isotherm modeled the process, with the mordant affecting both Freundlich constants. The value of the adsorption intensity constant indicated a favorable dyeing process for all mordants. The thermodynamic parameters showed that for all mordants, adsorption is spontaneous and thermodynamically favorable. In addition, the dyeing process is most likely a physisorption process. Finally, the kinetics for mordanted wool are best modeled by a pseudo-first-order equation. The presence of a mordant has a statistically significant effect on the rate constant.