Don't include unstable items which may release gas or deteriorate. Rubber and wool release sulfur gas; wood must be sealed away from metal objects or electronic equipment; polyethylene can permeate moisture as it ages so must be encapsulated in a waterproof container; PVC will break down and release acids into the capsule; diazzo film releases ammonia which will cause deterioration of the materials; foodstuffs decompose and will cause cross-contamination.

Do include photocopies produced using stable quality processes, preferably black toned print (not color) produced on archival quality photocopy paper.

Do remember to include information about how various items were created, including software packages and format of equipment. Include instruction for playback of any recording equipment.

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