New Australian research has revealed that some tattoo inks available in Australia contain toxic metals and carcinogenic substances at levels that would fail safety standards enforced overseas, prompting calls for closer scrutiny of what is being sold and used locally.
A study led by UNSW Sydney and published in the Journal of Hazardous Materials, analysed the chemical composition of 15 black and coloured tattoo inks purchased from Australian suppliers. While the research did not assess health outcomes, the findings show that inks currently on the market contain multiple regulated toxic substances and organic compounds that exceed internationally recognised limits.
Every ink failed EU standards
Researchers benchmarked the sampled inks against European Union chemical limits, which have been legally enforced since 2022.
‘When we benchmarked these products against EU standards, every ink we tested failed on at least one regulated substance,’ says the study’s corresponding author UNSW Professor William Alex Donald.
The analysis detected eight metals restricted under EU law in at least one ink sample: antimony, arsenic, cadmium, chromium, copper, lead, selenium and tin. These appeared in concentrations above the limits set under EU Commission Regulation 2020/2081 and the Council of Europe’s ResAP (2008).
More than pigment: what else tattoo inks contain
Tattoo ink is a complex blend of pigments, solvents and additives designed to remain in the skin indefinitely. Because it is injected into living tissue, it bypasses many of the body’s natural protective barriers.
The UNSW team also screened for organic compounds. Some inks contained toluidine, a carcinogenic aromatic amine, which was detected in three of the 15 samples, and sulphanilic acid, a substance not typically suitable for human consumption or therapeutic use, which appeared in nine inks. Both are banned under current EU tattoo-ink regulations.
Lead author Dr Jake Violi stressed that the study does not mean tattoos are inherently harmful, saying: We are not saying people should not get tattoos. We are saying the chemical content of inks matters – and there is very little routine checking of what is actually sold in Australia.
Additional metals raise questions
The study found bright coloured inks had additional substances not currently restricted under EU laws, including very high levels of certain pigment-associated metals.
‘Titanium was detected at concentrations of up to about 10,000 parts per million in a light-blue ink, Dr Violi said, adding: ‘Aluminium and zirconium were also present at very high levels. These metals are commonly associated with pigments that are used to improve colour and stability.’
While those metals are not currently regulated under EU tattoo-ink limits, their presence at such high concentrations raises toxicological questions given that tattoo pigments can persist in the skin and migrate to lymph nodes over time.
Limited Australian oversight
Australia does not have a binding national regulatory framework for tattoo inks akin to the EU’s. Instead, market oversight relies on voluntary compliance and occasional government surveys, the most recent of which predate the EU’s current legally binding rules.
Prof Donald said publicly available data on ink composition in Australia is sparse: ‘The chemical composition of inks currently sold here remains largely unknown. Because tattooing is now a mainstream form of body art, regular monitoring and aligning Australia’s standards with international best practice just makes sense.’
Surveys estimate a significant portion of Australian adults have tattoos – up to 30 percent – underlining the relevance of greater transparency and routine testing of inks sold in the market.
Sources:
UNSW News Room
The Journal of Hazardous Materials, December 2025
