1 - 14g Tablet wrapped in an old fashioned designed blue and white paper. Helps delay yellowing effect, keep white fabrics sparkling and clean white. Can be used in hot or cold water. (Information on packet of 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."