No... It would need to be colored blonde. White and grey hairs are that way because of a lack of pigment. Bleaching a way to remove pigment. Notice how some people can be bleached blonde. They have to be bleached then dyed to the blonde color they want.

Yes. Grey hair does turn blonde when bleached. It may not do so evenly, so a toner may be required to get the desired color afterwards. Grey hair is very difficult to color with actual tint because it lacks some of the qualities of hair that still has pigment. The hair does not respond as well to the types of dyes used on hair with more pigment, as those need the pigment molecules within the hair to bind to. They do make tints specifically designed for grey and other hard to color types of hair, but they don't always perform as well as hoped. After reading your comment to jt007m about your friend's short grey hair, I would not recommend just getting a blonde hair color, as grey hair still does have pigment in it, just not as much as full color hair. White hair, which incidentally will also respond to bleach, does not have any pigment left. Depending on what kind of color you get, blonde hair color may not lift and lighten the darker parts of her hair, it would only work on the lighter parts. With my 17 years of experience as a hair stylist, I would first recommend that you have your friend go to a colorist! :D After that, I would tell you to go to a place like Sally Beauty (because they carry much better quality products than most pharmacies or supermarkets) and get something like "Beyond the Zone On/Off Scalp Radical Bleach Kit". It contains everything you will need and instructions on how to do it. More than likely, you will not need a separate toner, but if the resulting color is not exactly what your friend wanted, it is easy to apply a toner (such as one from Clairol, also from Sally Beauty) at this point. If you're interested, I'll check back with this post to see if there's anything I offer as advice. Good luck!

No, the combination of amount of pigment left in the hair, strength of bleach used and the amount of time you leave the bleach in will detemine how long it takes to 'melt' the hair (yes this acutually happens). Another reason is that you cannot remove something that's not there, if it truly is 'grey' then I'll assume that there's nothing left in the hair shaft to be removed (the action of bleaching is breaking down melanin which gives hair it's color in the hair shaft).

Of course it can be "colored." NEVER bleach, that messes up the pigments. I suggest to never use over the counter colors. Go to a beauty salon and the can color it just the way you like it. If you did it at home,it could turn red, green etc..

There are already some extremely good answers here, so I will just add to them. Gray hair is difficult to bleach. If you want to go blonde and you do not want to go to a professional colorist (which I highly recommend) you can help the color take to your hair by using a neutral filler just before you color your hair. You could also use a color additive such as Gray Magic to the color mixture. Gray Magic (or other similar product)supposedly makes gray hair less resistant to coloring products. I have a few stubborn gray strands, so I add it to my color mixture and it works fine for me, BUT, I use a color that matches my natural color which is auburn. "Bleaching" gray hair is tricky. I had a journalism teacher who was always trying to "bleach" her gray hair and it never looked right. It looked like somebody took a leak on her head. She always had yellow patches and/or streaks. Good luck.

The most easiest one.