What is the best peroxide to cover grey hair

[Blondebomber]

Need some help here /// stubborn greys ,,, I would like to know if using 10 percent rather then 20 percent peroxide helps to cover more grey
:suprised:

 

[surf girl]

Why would you consider that as a thought? Genuine question

 

[Blondebomber]

Be coz , with 20 it allways seems see through ..help?

 

[surf girl]

What colour house are you using?

 

[ColorMeGiddy]

What formula are you using? What is your natural base?