Does revlon colorsilk already have bleach in it?

i dyed my hair black and i wanted to have higlights but i dont know if revlon colorsilk(bright auburn) would show up or not. does it already have bleach or do i have to put bleach on it first before dying it?Does revlon colorsilk already have bleach in it?
no, it doesn't. colorsilk is a very mild dye containing no ammonia and is also pretty weak. store bought hair dye will not work on your dyed black hair because they all contain 20 volume peroxide. 20 volume can not lift dyed hair any lighter, it has to be something with 30 volume or 40. i would recommend that you get a cap and hook highlight kit like frost %26amp; glow, they have it at stores. you could also get your favorite box color of red dye. put on the highlight cap, pull the strands you want through with the hook and apply the bleach cream. leave it on until it's dark yellow or orange and wash it out - do not remove the highlight cap! leave it on and rinse it out, shampoo the strands you highlighted and condition all while leaving the highlight cap on. then get out of the shower, either towel dry or blowdry the highlights 'till they're dry, with the highlight cap still on. then dye the highlights with the red dye your bought and leave it on 25-30 minutes, and don't remove the highlight cap. then rinse 'till the water runs clear and then you can take off the highlight cap. condition again and voila! red highlights! this will work perfectly, trust me, i've done it before. good luck!