The invention provides methods, compositions and kits for increasing the
brightness retention of a fabric laundered using a hypohalite-generating
bleach by employing an amount of bromide-releasing compound sufficient to
provide between 0.1 to about 1.5 moles of bromine ion to mole of
available chlorine in a wash liquor to mitigate the negative effects of
said hypohalite bleach on the optical brightener present in either the
wash liquor or on said fabric. The invention also applies to fabrics
washed using commercial laundry detergents which typically deliver an
optical brightener into said wash liquor, said optical brightener
generally exhibiting instability in the presence of said hypohalite
bleaches. By employing the inventive methods and/or use of the inventive
compositions, enhanced protection of the optical brightener is enabled,
resulting in increased brightening of the laundered fabrics, determined
versus a control as an increase in the Stensby whiteness measure of the
fabric by a .DELTA.W value of greater than about 3.0.