Allow more room for creative expression.
The contrast will be the strongest with light to medium skin tones.
May require multiple sessions.
More costly due to the level of detail and time to complete.
More painful as the layers of color are added on top of cut skin.
Better for covering existing tattoos.

Cost less money.
Are completed in half the time.
Have less damage from the sun because even if they fade the contrast will still be clear.
Create a strong contrast that is easy to see on darker skin tones.
They are neutral and won’t compete with colors from your clothing.