Τ 18 color

#1
Yesterday was bday (yay!) and a friend of mine order me from internet the famous t18 toner by Wella. I have platinum blonde hair (tone with KP 10.16). I want to try next time I do regrowth, to try this toner on my hair. I will lift to level 10 and then "bleach bath" the roots to clean the previous dye (10.16). Then I wonder how to correctly use the T18 on a level 10 bleached hair because here in Greece, we don't have this toner (she ordered it online) and after some research I found out that many people complain that THIS toner destroyed their hair. Even my friend, she used to be platinum and once she used that toner, she got fryed ends. (On level 10 bleached hair)
Any suggestions?
 
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