Detecting early tattooing in the Pacific region through experimental usewear and residue analyses of obsidian tools

Although tattoos have been observed on mummies dated to over 5000 years old, the generally poor preservation of human remains makes it difficult to use this type of adornment to understand how inscriptions on the body have been used to define self and social ascriptions. A potential method for detecting tattooing is to identify the tools used to make the markings. To assist recognition of tattooing tools, an extensive set of experiments was conducted in which retouched obsidian flakes bearing various pigments were used to pierce pig skin. Diagnostic use wear and residues associated with tattooing were identified. To illustrate the value of these results, traces preserved on a highly recognizable class of obsidian retouched artefacts from the Nanggu site (SE-SZ-8) in the Solomon Islands were analysed. Results indicate that these tools were used to pierce skin and may therefore have been tattooing implements involved in social, ritual and/or medical practices.