Can the PicoSure treat White Ink?

Yes, the PicoSure at LaserYou can treat all colours including white. However it’s likely that white ink will oxidise or darken (usually to a grey colour) when a laser is applied to it. Sometimes it’s unavoidable to overlap onto white ink due to the design but as long as you are fully accepting of the risk, it can be treated. Sometimes the grey colour will lighten with further treatments.