Good Morning Susan,
Fun object to be looking after! You are on the right track with archival paper housing. They are a form of print, and being a transfer print, need protection from high humidity which a controlled storage environment will offer you. I recommend they be individually housed in 4x5 negative paper sleeves.
------------------------------
Michele Phillips
Paper Conservator
New York State Office of Parks, Recreation & Historic Preservation
Original Message:
Sent: 03-23-2016 02:56 PM
From: Susan Haake
Subject: Long term storage for temporary tattoos
Hi all! As part of the National Park Service's 100th birthday this year, our park has designed temporary tattoos to give out to visitors. I'm saving several for the collection but I'm a bit stymied as to how to appropriately store them. My guess is a acid-free paper envelope interleaving with acid-free paper, but I'm open to other suggestions. Thanks!
--
Susan M. Haake
Curator
Lincoln Home National Historic Site
413 South 8th Street
Springfield, IL 62701
(217) 391-3246