u/musicgirl2000s

I have not worked with this bleach before can someone tell me if this is good for highlights on virgin hair. Her hair is a leval 3/4 and we just wanna lift enough to put a hot pink. I’m doing a partial highlight since she has a bit of highlights already and then adding the hot pink. I have a 20 developer from another brand already. I just have not used this so I’d like to know what to expect !
Any tips will help. Also I cannot seem to find the mixing ratio for foils on the packet