Yes, it's fine to apply permanent color over semi permanent.
yes, but semi-permanent colors will not lift you natural hair color, and if it you put a lighter color over a darker color it will not do much other than give shine
yes
yes
yup
Splat hair color is not a permanent color it is a semi permanent color over bleached out hair, once the melanin (color) is removed from the hair the hair is very porous meaning it absorbs like a sponge and the cuticle of the hair is open so once you have put a semi permanent over it which just deposits that cuticle is still open leading to the color fading out!
You can do anything. I would guess it would keep your permanent hair dye looking fresher and brighter if it was the same color, but don't completely change colors.
yes, however it has to be a darker shade. Semi permanent dye will never lighten your hair so you can use it to go darker but not lighter.
yes, however it has to be a darker shade. Semi permanent dye will never lighten your hair so you can use it to go darker but not lighter.
YES!!! i did it and my hair looks great now
Yes, but within a months time, when you put semi permanent in you have to let it settle into your hair. If you put the permanent on right after the semi permanent it will kill your hair and make it fall out. So, let it set for a month and THEN put the permanent on. I hope I helped :)
you can do this, however it may slightly change the colour of the highlights. But dont worry, your hair wont fall out or anything!
Yes but it will only take effect on the roots, and it will wash out.