not good for black hair

I have a very black hair, and I bought the grey/silver color one to try it out. but didn't work at all.
if you have a super dark hair, I would not suggest it.

WORST HAIR COLOUR PRODUCT EVER

I used this product correctly - I have bleached hair, did not wash it, etc. I thought this was a powder but it's actually a smelly liquid that does not show!! I COVERED my ends with this and the red barely showed up on my blonde ombre hair. It's super wet and got all over my arms and the pigment did not improve when it dried. Plus the applicator started to leak EVERYWHERE and got all over the sink, counter, floor, etc. like blood. Then my hair just looked orange instead of red. Hate this so much, DO NOT BUY!!!