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Robin blue liquid is a fabric whitener and is safe for use as it is not injurious to your skin. It is also gentle on all types of fabrics and gives it a dazzling white finish. The smooth suspension of blue liquid in water produces even whiteness to the fabric. The uniform application of blue on the fabric leads to distinctive dazzling whiteness that not only gives a smart look to the clothes but also enhances life of the dress. Add 4-5 drops of Robin blue to 1 litre of water. Dip washed clothes one by one and swirl 2-3 times. Squeeze and hang out to dry.