yes
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!
Yes, but you can get a funky color if you do it wrong.
Do you mean pastel hair dye? It depends on if you use a permanent dye or a semi-permanent. Semi-permanent hair dyes will wash out and fade over time; permanent hair dyes will stay in the hair until you cut it or dye it another color.
It will gradually fade back to your natural hair color. Semi-permanent colors only deposit..they do not penetrate the hair they just coat the strand of hair.
yup
Yes, demi permanent hair color can be applied over any type of color. It will refresh the original color very nicely.
yes you can will it kill your hair yes but you can
Yes. Over time it will permanently lighten your hair.
yes but if you want to go red for instance you need to build it up
apply all over
Yes, I died my hair 5 times over 4 days in a row, and my hair is perfectly fine! (fine as in good condition). But consider the condition of your hair, is it already dry and split? or is your hair neutrally thin? If so, it isn't recommended. But don't bother asking your hair dresser because they always have to be safe, otherwise they can loose their job..... so, if your hair is in reasonably good condition, then yeah two dies won't do much other then change the colour!:) Just make sure you condition well (I usually do it twice after I've coloured). Hope I helped:) P.s, if you want to die it PERMANENT twice in one day, then after you've coloured it once permanently, you need to buy something from Lorilee or John Frida that is designed to remove the die. Otherwise, the next permanent colour, won't work! Hope I helped:)
Semi permanent colour will wash out in 6-8 weeks.