Wash or not wash fabric

I always wash all my fabric before using it. I have many allergies and can not handle the fabric with out it being washed. I also use "color catcher" in the washing machine. These are purchased in your local grocery store and catch all the bleeding that any fabric might have. Even though I wash lights with light and darks with dark the color catcher sheets are great. About 24 come in each box. Marge