BACKGROUND OF THE INVENTION There are various recognized methods for dyeing and/or incorporating additives into fibers and other fibrous materials, including methods which utilize organic solvents such as dimethylsulfoxide (DMSO), dimethylacetamide (DMAc), dimethylformamide (DMF), N-methylpyrrolidone (NMP), N-cyclohexyl-2-pyrrolidone (CHP), acetophenone, acetanilide and methyl benzoate.