Mrs Stewart's Liquid Bluing

Mrs Stewart's Liquid Bluing is a simple, concentrated blue liquid that optically whitens white fabric. It does not remove stains, does not "clean", but adds a microscopic blue particle to white fabric which has been giving fabric that "just bought" whiteness for 120 years! The most effective, safe, versatile, economical laundry whitener available! Mrs. Stewart's Bluing is nontoxic, biodegradable, non-hazardous and environmentally friendly. Made of a very fine blue iron powder suspended in water ( a "colloidal suspension"), a nontoxic amount of a pH balancer and a biocide to prevent the buildup of algae and bacteria.