this one is just a microfiber towel, ionized to attract any dye that gets into water, see ingredients list
so, for ex, let’s say you have a navy border scarf with white field ... any navy dye that gets into the water will be absorbed by catcher before it gets absorbed by white field turning it bluish ... Good
BUT
the navy dye has still BLED, it will no longer be as vibrant a blue, might be duller
the navy may still come out looking WASHED ie dull like the new WASH scarves
moral of story, unless you want the look of a wash scarf, keep it in the water for as short a time as possible