How can I dye my hair platinum blonde, I have currently dyed it dark brown and am naturally strawberry blonde?

For the summer I really want to go platinum blonde however my hair at the moment is dyed permanent dark brown and is naturally strawberry blonde/ auburn, What can I do? and how long should the process take??? please help!! xoxo
How can I dye my hair platinum blonde, I have currently dyed it dark brown and am naturally strawberry blonde?
If you currently dyed it..you will have to leave it for a few weeks or more, for the dye to not be still completely stuck to your hair.

Then, you bleach the hell out of it.. using a 30 or 40 volumizing cream with your bleach powder. Then... platinum blonde toner.

Then, you will maybe need some platinum blonde dye. im sure you can do it fine by yourself, but you might need to go to a salon if you are not experienced at doing bleaching alone at home. hope that helps. ( you may need a hair colour stripper)

OH also, i just saw the first answer.. it will not take a few minutes. I have black hair, and i can get it pretty blonde, but you have to leave the bleach in for a whiiile. also, dont usea t home bleach... thats just wrong.
Reply:Try using a color remover that you can get it at a beauty supply (Sally) store. Regardless, you should at least consult with your hairdresser, if you don't want them to do it.
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Reply:i would go to a salon without a doubt. unless u like bright orange clown hair. i once made that mistake and was wearing a hat for a week until i could get it fixed. if u do it yourself, it is more then likely it will turn a skew and u will have to visit a salon anyways for a colour correct. so why not save yourself the time, the hassle and the embarrassment . get it done right the first time. trust me!
Reply:go to a salon and get it done. don't do it yourself. you will screw up/fry your hair, chances are anyway. you'd probably have to get it stripped. it's too dark right now to dye it once and get platinum, and if you dye it more than once chances are yeah like i said, you'll fry it. fork over the money, do it right, go to the professionals.
Reply:If you want to go light again, you have to bleach your hair first....this will only take a few minutes There may be some bleaches they sell specifically for hair, but I once met a kid who just used regular old bleach once. :P I don't recommend that.
Reply:marilyn monroe was a natural redhead im pretty sure, back when she was norma jean. pretty easy to go platnum blonde with some peroxide!! Go to your hair dresser and get them to do it. they might insist on doing it in 2-3 stages coz it is so drastic for your hair. But i defo dont think you should try it at home, you just might end up with a orange mess on your head.
Reply:just dye it blonde first then add the platinum later this way you have provided the hair with a base coat of blonde than the platinum should look proper awesome ontop of that