Abstract: A cost effective process is provided for making stable, efficacious, amino acid and polyhydric alcohol free concentrated aqueous aluminum zirconium salt solutions. Absence of amino acid, low iron content and low trace metal impurity levels improve compatibility with fragrances and minimizes the probability of the product color change and possibly fabric staining significantly. The novel aluminum zirconium actives also minimize iron contribution to underarm area that supports growth of microflora which is responsible for axillary malodour by the biotransformation of nonodorous precursors present in perspiration. The astringent complexes of the present invention may be obtained in solution or dry powder form. As a result, the complexes are satisfactory for use in any of wide variety of conventional antiperspirant forms.

Abstract: Antiperspirant actives that produce practically no visible white residue, even against a black background is provided by the reduction of the particle size, using a refractive index modifier, to a point where the antiperspirant active on application provides no discernible whiteness. When formulated into an antiperspirant stick, the antiperspirant actives produce an improved combination of functional properties, including excellent antiperspirancy, smooth skin feel, nontacky, quick drying and leave no visible residue. The exceptionally high surface area of the antiperspirant active results in rapid and efficient delivery of the active to the sweat glands and possible absorption. The absence or reduced quantity of suspending and flow enhancing agents, of gellant and surfactant, is believed to improve the antiperspirant active's ability to physically reach the sweat glands and improve efficacy.

Abstract: Antiperspirant actives that produce practically no visible white residue, even against a black background is provided by the reduction of the particle size, using a refractive index modifier, to a point where the antiperspirant active on application provides no discernible whiteness.