Precisely, I am interested on bowls and containers with circular cross section. I'm looking for both use-wear studies and experimental reports.
Patricia Anderson (CEPAM) is one of the references in lithic use-wear analysis.
You should also contact the Obsidian Use Project team (http://www.obsidianuseproject.org/OUP/) and especially Laurence Astruc.
1. HCl and H2SO4 can not be useful because they form poly atomic species very easily and cause to interferences.
2. Perchloric has very high boiling point ( 203 degree C). This may cause evaporation, harm ful processing during analysis.
3. Hydrofloric acid digestion also have health risk during process.
4. Nitric acid 1.5 to 3% w/v is proper because of its easy dilution and comparatively not much harmful effect.
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