Preparation Guidelines

Normally, a single small hydration cut is made for each sample. If you have any special requests regarding the location of measurements on any artifact or would like measurements made at more than one location on the artifact, please attach a separate sheet with a photocopy or tracing of the sample(s) and well-marked hydration measurement locations. It is best not to mark the artifact directly with any type of paint (such as correction fluid) since this may make the hydration rim more difficult to measure . There are no size restrictions for samples submitted only for obsidian hydration analysis, although very small samples may be completely destroyed during slide preparation.