Protect the evidence from inadvertent indented writing. Mark documents unobtrusively by writing the collector's initials, date, and other information with a pencil. Whenever possible, submit the original evidence to the Laboratory. The lack of detail in photocopies makes examinations difficult. Copies are sufficient for reference file searches.
Flash paper is a hazardous material.
Do not store flash paper near combustible materials. Seal flash paper in polyethylene envelopes and refrigerate. Do not store or ship photocopies in plastic envelopes.