Going blonde, best home hair colour?

If the measurements are worrying you, I'm sure people here could help you with that.  Usually you just get a plastic bottle to mix it in there that has the numbers written on it to help make it easy. 

If your hair is currently dyed, you will have to remove the dye before doing anything else.  The dye won't lift your current color.

If your hair is natural right now, and if you lighten your hair to yellow with your lightener, you'll need to put ash over it to make it a nice shade of blonde.  If you were getting your stuff at Sally I'd say get a violet base blonde dye, but I don't know about box colors.  If your hair is already yellow and you buy ash, you'd probably be okay.  Its likely that a blonde "ash" will mean a violet base - but test strand to be sure before doing your whole head, with everything you use, because thats just a guess, and you need to make sure your lightener is going to get it light enough, not just to orange, and that it won't be too damaging to continue.

You dont have alot of options then,but you could use Loreal Blonde supreme (that is supposed to lighten hair up to 3 shades to a light blonde) as well as Les Blondimess.

When I was a blonde i used blonde supreme in (I think?) extra light natural blonde. It was always a bit more golden instead of white looking,so I'd alternate between that and Champagne blonde every couple of months.

Its probably not a good idea to use that (bleach), then use a high lift dye after that.  It would be very bad for your hair.  Its not absolutely necessary to use something as harsh as bleach to remove your dye, is there any way you can get a box of One n'Only Colorfix?  Its got peroxide, but not alot and its way better for your hair than bleach.  It would remove your dye, leaving your hair either orange or yellow, at which point you could then use a regular dye over it.   If your hair comes out orange, you may want to colorfix again until you get it all to yellow (test strand that though, make sure its going to work before doing it).  Once its yellow all you need is a dye with a violet base to go over it.  If you still want to use only boxed dye, you should probably call the company that makes the dye and ask them which of their ash blondes has a violet base (its the only way to find out with boxed color).  That's if your color-removed hair is Yellow though, not if its orange.

Well Im going to use the bblonde beach, I got the 9%, and a got a semi perm dye and an extra toner which I know is a nice dark shade of purple incase any gold tones shud appear. If all else fails it'll be goin a nice light brown.