Mrs. Stewart's Bluing whiten whites safely. This bluing doesn't contain any harsh chemicals, which means your clothes will stay as strong, fresh and clean as the first day you bought them! This product is also non-toxic and biodegradable.

As home washing tips are passed down from grandparent to parent to child, more and more people are discovering the value of Mrs. Stewart's Bluing (MSB)! Not only does it whiten whites, it also brightens colors and does so without harsh chemicals, prolonging the life of any garment. People are seeking environmentally safe products and they know that MSB is non-toxic and biodegradable.     

The versatility of MSB seems infinite. While manufactured as a laundry whitener, many have found other uses for bluing as well. Use to make a Salt Crystal Garden, whiten dingy hair on a pet, reduce algae growth in bird baths, fish ponds and fountains, ease the pain of an ant bite or bee sting, and much more with this unique, versatile and economical product that has been a staple in many homes since 1883!

What's In This Stuff, Anyway?
Basically, bluing is made of a very fine blue iron powder suspended in water ( a "colloidal suspension"). We add a nontoxic amount of a pH balancer and a biocide to prevent the buildup of algae and bacteria. (This may be why Mrs. Stewart's Bluing is loved by farmers who tell us they use it in the water troughs of their farm animals and by owners of lily and fish ponds.)

Mrs. Stewart's Bluing is nontoxic, biodegradable, non-hazardous and environmentally friendly. While we cannot guarantee that no one will ever be allergic to Mrs. Stewart's Bluing, we can say that we have not seen any reports of such an allergy thus far. In fact, several of our customers use Mrs. Stewart's Bluing because it is one of the few laundry products from which they do not experience an allergic reaction.

Mrs. Stewart's 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.

Basic Instructions
Always dilute bluing in cold water BEFORE adding to wash load or rinse water.
1. Mix a few drops or up to 1/4 teaspoon of bluing (depending on wash load size) in a quart or more of water.
2. Add diluted bluing to wash water or final rinse (water should appear light sky blue).

Read more about it
All about and how does Bluing work (pdf, new window from mfr)

MSDS (pdf, new window from mfr)