A term used to describe fabrics of sufficient color retention so that no noticeable change in shade takes place during the normal life of the fabric.
Colorfast Fabric And How It Affects Your Laundry
How To Test For Colorfastness When Doing Laundry & Removing Stains
How To Set Fabric Dye In Clothes – Popsugar Smart Living
How To Prevent Fabric Color Transfer, Bleeding, And Fading – Dengarden