To produce effective tattoo pigment breakup, a tattoo laser must be capable of producing sufficient energy within the pigment's absorption range. Other colors in tattoos, such as yellow, green, and fluorescent, are more difficult to remove than dark black and blue because their absorption spectra lie beyond the emission spectrum accessible in the tattoo removal laser. Titanium dioxide, which is extremely reflective, is found in high amounts in recent pastel color inks. As a result, such inks are difficult to remove.
For more details, Consult Dr. Deepam Shah one of the best Dermatologist in Mumbai.