The subjects are from Whanganui, Wellington and Auckland. Mr Wotton - who has no tattoos himself - found the people through talking to tattooists, stopping people in the street, and word of mouth.
While it may seem unusual to display tattoos in black and white, for Mr Wotton it was a deliberate choice.
"I didn't want the colour of the tattoos to overwhelm the people. The tattoos are important, but they are secondary to the people.
"I thought all these people looked interesting - and I would have wanted to photograph them even without their tattoos."
Mr Wotton said he thought black and white format gave the photos a sculptural look.
Mr Wotton is a printer by trade, working as a compositor and linotype setter for the Wanganui Chronicle in the 1960s and 1970s. But he always had an interest in photography and began to study it seriously in the mid-1970s. He is a self-taught photographer.
Marking Time runs until February 5.