The European Commission has claimed ink used for tattoos and permanent make-up can cause health risks as it contains pigments of low purity.
Their report said pigments are not made specifically to decorate skin, nor are they authorised for use in cosmetics, according to Ultimas Noticias.
The study showed that most inks are imported from America and colourants can be degraded on the skin, especially if they are exposed to sunlight, ultraviolet rays or a laser.
Azo pigments in the ink can release harmful carcinogenic aromatic amino acids.
It was also found that the ink could cause possible allergies and hypersensitivity, which could emerge decades after the tattoo is inked.
The report warns that there is little information available about tattoo complications, as there is no systematic collection of data.
The European Commission has called for current requirements for chemicals and their labeling to be updated and believe better analytical methods are needed to study the ink.
They are also calling for guidelines on risk assessing the inks and better practices in their manufacturing.
The commission will now use the evidence to decide whether measures are needed at a union level to ensure inks and practices for tattoos and permanent make-up are safe.