How to Check the Colorfastness of a Fabric

A colorfast test helps you decide which fabrics are going to bleed in the wash
-Fill a glass with hot water.
-Add a drop of detergent.
-Place a scrap of fabric into the water.
-Let fabric soak for a few minutes.
-Remove fabric from water. Blot with a white paper towel.If dye bleeds into the towel, redo the test with the same fabric scrap. If it still bleeds, then there is a problem