When can I use Ultra Clorox Citrus Blend Bleach? For the cleanest whitest whites, use Ultra Clorox Citrus Blend Bleach in every bleachable load. Most white fabrics and some colored fabrics can be safely washed with Ultra Clorox Citrus Blend Bleach. If uncertain about dye colorfastness. Test fabric by applying one drop of solution made of 2 teaspoons Ultra Clorox Citrus Blend Bleach plus 1/4 cup water to hidden part of seam. (Be sure to check all colors.) After 1 minute, blot dry. No color change means article can be safely blended. Avoid bleaching wool, silk, mohair, leather, spandex and non-fat colors.