Yellow and orange tattoo ink are inherently difficult to remove because much of the laser light will simply pass through them. Therefore, photo thermal reaction to laser energy will be minimal. However, the PicoSure laser goes beyond photo thermal action by creating a powerful photomechanical PressureWave which helps break up lighter colored inks as well as the tough inks seen in recalcitrant tattoos. At Hall Plastic Surgery in Austin, Texas we were the first in the country to receive Boost upgrade which increases the Pressure Wave by up to 70%. It is possible that some unique orange and yellow inks may turn darker when treated with laser. When in doubt, your provider can perform a test spot.