Bigen Speedy is excellent for darkening grey hair to meet your needs：
Moderate Darkening：
Grey hair can be significantly darkened in just 5 minutes.
Gradual Darkening:
Grey hair can be gradually darkened via repeated application with shortened color developing time.
Perfect Darkening:
Grey hair can be perfectly darkened by extending color developing time to 10-15 minutes.

How to use:

Open the seal.
Squeeze out the cream.
Comb through the hair.
Rinse it.

Note: Product delivery duration may vary due to product availability in stock.

Disclaimer: The color of the physical product may slightly vary due to the deviation of lighting sources, photography or your device display settings.