The present invention concerns solutions having an antimicrobial activity. The solutions described herein comprise particles containing slightly soluble metallic salt and surfactant. In the solutions described herein, the molar ratio between the slightly soluble metallic salt and the surfactant is lower than or equal to about 1. Also described are substrates comprising the solutions, methods for producing substrate comprising the solutions, methods for producing the solutions and uses of the solutions for substrate finishing and substrate sanitization.
