Depending on the number of the dye, it may be semipermanent, a rinse, or permanent. Read the box to find out which one it is. For all but permanent, over time, shampooing will remove the dye. If the color is a disaster, go to a professional colorist who can help correct the color to something you can live with.
Between 8.5 and 9. Permanent colours are alkaline.
There is permanent hair color and semi-permanent hair color. _____________ Demi permanent and temporary are also known as non permanent hair color.
Yes, it's fine to apply permanent color over semi permanent.
Equivalence point is the point at which the reaction is justcomplete. End point is when there is a permanent color change due to the presence of a indicator.
There is basically no difference between Japanese hair and American. The only difference is the color, Japanese tends to have darker brown color, where as American have bronze color.
Yes, you can apply permanent hair color on top of semi-permanent hair color. Make sure that you do a deep conditioning treatment or hair masque before and after you color your hair.