No.
No you need the powdered bleach with the developer.
No, developer alone, (despite the volume), will NOT lighten hair. It will only open the cuticle. In order for lightening to occur, either cream, powder, or oil bleach must be added.
NO...What would be the purpose? Developer is just an activator for color or bleach.
Yes, using less developer and more bleach will help the bleach to process more quickly. They always say, "Thicker is Quicker" but it you need more lift, use a higher volume.
You use equal parts of Bleach, developer, and shampoo. 1:1:1 :D
The amount specified in the instructions for the product you are using.
Cream developer alone will not lighten your black hair. You will need to use a bleach or lightener with the cream developer to lighten it.
It is possible to color your hair then dip dye it afterwards in the same day. However, it is recommended that you use a 10 developer or a 20 developer, as a 30 developer and a 40 developer can cause more damage to your hair. It is also not recommended to bleach your hair more than once every two weeks.
You buy bleach developer and powder, liquid, or oil bleach. Put it on the tips of your hair and wash it with tonerafter 30 minutes or so.
No, it lifts your natural hair color by use of the developer. The higher the volume of the developer the more lift you will get in your hair.
No. Using a developer by itself will only open the hair's cuticle. You will need bleach or a high lift color, in combination with a developer, to actually lighten it.