I used Schwarzkopf Live Colour XXL 00B to bleach my own hair, and it worked! So I figured, if it worked for me, it might just work for my chocolate brown extensions! Nothing ventured, nothing gained!
There's normally a pretty immediate change in colour when you apply the dye, it's small but noticeable! But there was nothing shifting in the extensions. Seeing as it wasn't 'living' hair, I decided to leave the dye on longer than the recommended 40 minutes. I left the dye to do it's job and checked on them 60 minutes later.
And, what did I find.....Not a lot to be brutally honest. To my eye they looked basically the same!
Then I looked very, very.....very closely. There is a slight change in some strands, but nothing light enough to take red dye :(
I reckon if I went at them with about 4 more boxes of dye it might eventually lighten them enough to dye them a similar red to my own hair, but that's a lot of time and money!
Mission status: Failed!
Anyone wanna buy some....slightly used hair extensions?.....No?...Didn't think so!