Dry items should be packaged in porous containers such as paper bags, envelopes, and folded paper. These types of containers allow air to pass through, reducing the possibility of damage to the DNA.

Wet items should be allowed to air-dry prior to packaging or layered with several sheets of clean paper to contain the stain and then placed in the appropriate container.

Very wet items can be transported in plastic containers but should be air-dried as soon as possible.

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