Since I mostly use recycled fabrics everything is washed. I iron and starch my pre-washed fabrics before I cut, When I buy new fabrics to finish out a mostly recycled quilt, I take them to the basin and rinse them until the dyes don't run. I like to iron them and fold them on 5 inch square cards if they are small or 12 inch cardboards if they are large. That makes storage neater.