Schwarzkopf hair colour developer (Davisville)

I don't really know what this is for - it's some kind of "professional" i.e. salon stuff for hair colouring. It contains 12% hydrogen peroxide (vs 3% that you buy at the drugstore). If you know exactly what this is for then go for it; if you're not sure, then it probably isn't something to experiment on your hair with! I bought it at the Sally Anne store thinking it was pure 12% hydrogen peroxide, but then discovered it's a thick white gel, so not useful to me. There is also no expiration date on this, so beware. I take no responsibility if it turns your hair green or something...

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