3.6 Cleaning

The flint flakes recovered after burial were too dirty to observe residues microscopically and thus some cleaning was required to remove excess soil. Each experimentally used flake was held with a new non-powdered nitrile gloved hand while a gentle stream of ultrapure water expelled from a squeeze bottle with a fine nozzle was used to remove soil. Subsequently, each flake with its associated bag was set out to dry on a tray lined with new cling film. Care was taken to ensure that no samples or bags touched each other.


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