Help - bleach and damage worry

[chocheaven]

My natural hair colour is strawberry blond. I have had highlights for many years but lately they don't seem as bright as usual.
I've spoken to a different hairdresser who said she can get my hair "whiter" and would use 9% peroxide. I'm concerned as my hair is fine and does break easily.
Will it be ok to use 9%? I think I've only ever had 6%.
I don't see how my hair can change that much with highlights.

pic of how my hair is now and the colour I'd like to get it to.
Is it doable?

 

[Laurajane_85]

I'd say that second picture is bleach then toner. Bleach doesn't always necessarily give you white hair. You also need olaplex

 

[AcidPerm]

No, I wouldn't use 9% on existing highlights. I would expect a good colourist to offer to do strand tests to see how the hair reacts to a stronger lightener mix without risking serious damage.

 

[Loopy4255]

I'd say that second picture is bleach then toner. Bleach doesn't always necessarily give you white hair. You also need olaplex

Where does good deals on Opalex x

 

[chocheaven]

No, I wouldn't use 9% on existing highlights. I would expect a good colourist to offer to do strand tests to see how the hair reacts to a stronger lightener mix without risking serious damage.

What would you suggest to get my hair "whiter"? And to make it last?