Reckitt’s Crown Blue is the best and safest way to keep white fabrics a sparkling, clean white. Crown blue can be used in hot or cold water. It does not contain dye or bleach.
(Directions on how to use Reckitt’s Blue)
1. Wrap blue in cloth (cotton or muslin is best).
2. Stir while squeezing the blue in the last rinsing water.
3. Dip articles separately for a short time and keep them moving.