But he added that he was concerned about a recent EPA (Environmental Protection Authority) survey which found that nine of 18 brands did not comply with EPA guidelines because of the level of heavy metals found in them.
"Many people may not be aware that tattoo inks may pose harm from the chemicals from which they're made," Mr Ryall said.
The minister said the results of the EPA survey had been published to inform tattoo artists and people deciding whether to get a tattoo.
Ms Stewart asked whether Mr Ryall would consider restricting the sale of tattoo inks to licensed artists.
Mr Ryall said if it was clear that the industry was not responding to the voluntary guidelines introduced by the EPA, then further Government regulation could be required.