Yes, it's the sun that helps with the processing. A hair dryer can be used as well if the weather's overcast.
Its depends what shade of blonde your hair is before you use the lemon juice but the average length is probably 1-2 months.
Lemon lightens the hair, it depends how long you stay in the sun. If you stay in the sun really long for about 2-4 hours or so, it wont dye it , but lighten it, it depends on how light you want it, and how dark your hair is . :)
Lemon juice has a very high acid content that causes a lightening of hair color.
lightens it or bleaches it
No
The acidic quality of lemon juice can lighten the hair slightly when exposed to sunlight. Hair should be dry so that it can absorb the lemon juice properly.
You can dye your hair blonde naturally by applying lemon juice to your hair and sitting in the sun. The acidic lemon juice will react with the heat and light from the sun to naturally lighten your hair.
yesif you want to bleach it
yes, it does put lemon juice on a toothbrush and scrub and it should come off :)
a month or two
yes put lemon juice on your hair and go out in the sun :)
You can lighten your hair quite a bit if you spritz it with lemon juice and go out in the sunlight (this is an old trick my grandmother taught me, and works best in summer). If you want to darken it temporarily, you can use coffee.