How can I get the perfect blonde color?

I have dark hair. How can I get the perfect platinum blonde hair color?

Go to a beauty supply store sucg as salleys
and ask for kwick white bleaching kit
you will need to buy a developer that is a 30 or 40 volume
then buy the blonde color you want from the store that is ment for birght brown colors
keep in mind that bleach is to lighten your color not give you the result you want
remember to keep it in your hair no longer than 50 mins
once you see that your hair color is bright blonde
rince it out throughly and wait a week before dying it with color dye

I'm no expert but I am a hairdresser lol. Platinum blonde isn't the type of colour you get with one application. You would have to build it up with a few applications with a high percentage of bleaching podwer and poroxide (usually)40 or 30 volume, depending on how dark you are. But if your Dark haired you'd be better having foils done and just keep getting them in, every 5 to 6 week. To be honest they're nicer looking than an all over blonde and less painful. Just ask a your local hairdressers that you want thick slices in your foils and make sure you tell them your building them up to be blonde. Don't forget to really condition your hair with a treatment as Blonde is the most damageing colour there is.