Whiten your whites with the help of Mrs. Stewarts Liquid Bluing concentrate. This product improves the brightness of white fabrics by adding a blue pigment that counteracts the natural yellowing that occurs during regular washing. It can also be used to darken jeans and other dark blue fabric. This liquid laundry bluing can be used for synthetic and natural materials without harming the fibers, unlike the usual bleach. Other applications include cleaning glass and crystal, bluing swimming pools, whitening hair and pets, and more. It is non-toxic and biodegradable. Mrs. Stewart's fabric bluing is sold as a pack of 12 (with 8 oz per bottle).