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Q: i bought Developer 30 with (9v very light cool blond . how long time should i put it ? my hair is dark brown and i dont want my hair be orang or red

Colour doesn’t lift like lightener does. Light blonde cannot make dark brown hair blonde. It may lift your hair 2-3 levels with 30 volume, but you will end up with medium brown at best. See a professional if you want to go from dark brown to blonde. It will take multiple sessions. Or, buy lightener and lighten the hair in two sessions first, before trying to dye it to a blonde tone. The other person said use “ash” but cool blonde also has blue undertones, so ignore that. You can’t lift dark brown hair to blonde with colour. Leaving it on longer won’t change that, once the oxidation process is complete, nothing more will happen.

Q: what color do you get if you dont bleach your hair and you have light brown/blonde/gray?

This is great if you have naturally dark hair. I use 30 volume with this and it doesn’t damage like bleach. My hair is fine. I lift all of it every two weeks till I get the level I want. Then do roots about every 4-6 if needed. It blends new growth so well!!!! So this is much easier to do at home. At volume 30 it took me from dark brown to a 6-7 level in one 45 min session. It does take a little time to go past that but if you plan to stay blonde and not constantly switch, this is where it’s at. You can get super light! As for the toning quality in this lifter, it’s about worthless for us that have darker resistant hair. Apparently it overtones on light blonde. So for the darker hair girls like myself, you’ll have to wait two days and tone it a bit more to cool the color. It’s never been an awful brass though. I’m grateful, since sometimes I don’t have time to turn around and tone. So yes, I’m glad it has some toning qualities.

Q: My current hair color is about 50/50 (silver and light brown) I'm going to use a cap and pull though several strands of hair. Do I need to bleach?

I would bleach my hair first, otherwise your color will not take on the light brown. But if you use a bleach make sure you buy olaplex #1. You put it in the bleach mix so you will not damage your hair. I am not a hair expert, this is just what I would do. Also condition with olaplex #2. This stuff is amazing.

Q: What is included in this purchase?

Only the hair dye. I also order the Ion developer. I use the Ion sensitive scalp 20 volume developer for my thick dry hair. Depending on your hair type you may want to research that. There are different volumes. Mix the 2 together following the instructions and you are good to go. Hope this helps. Take care!