2 to 5 business days
.Wet hair thoroughly.* Wear Plastic gloves before opening black hair Shampoo Sachet.* Use the entire black hair shampoo sachet and apply on Hair.* Massage hair well for 5-7 minutes until the shampoo is evenly spread out on scalp.* Rinse Well with Water.* Its better to massage longer on the root of the hair, finally wash it with clean water.
Application tips:
1. Put on gloves (otherwise the nails will be dyed grey, although that does not affect health)
2. Make your hair wet with both your hands.
3. Wipe off the water on the hair.
4. Pour two component bottles of "Wash for black "by 1:1 onto your palm, Mix them gently (the quantity is about twice that of a normal washing)
5. Promptly put the shampoo on the hair and rub it until it reaches the bottom of the hairs, then rub the hair for 5-7 minutes so that the shampoo moistens the bottom of each hair.
6. Wash the shampoo away.
7. The hair will become dark and shining