First, pour the entire essence product into the main product, then shake to mix thoroughly. 

Second, after mixing, pour an appropriate amount of the product into the lid. 

Third, apply a small amount of the product to the brush and paint the center of the vitiligo area, then apply it to the boundary with the skin. 

Finally, although the product displays color immediately, it takes 6 hours to achieve full waterproofing, so 

If possible, apply it in the evening when it is completely dry, and replenish it in the morning.