The National Park Service used to have a ‘Conserv-O-Gram’ on this exact issue with instructions for determining if your artifact could be a candidate for relaxing and if so, how to build and utilize a humidity chamber.

Here’s the whole list of them:
https://www.nps.gov/museum/publications/conserveogram/cons_toc.html#collectionpreservation <https://www.nps.gov/museum/publications/conserveogram/cons_toc.html#collectionpreservation>

Cheers!

Terri Bedore
Independent Consultant
231-715-1759 office

NEED TO REACH ME QUICKLY?  231-715-1759   Email won't do it.  I only check once a day.

> On Apr 20, 2016, at 9:03 AM, Andrew Kirkland <[log in to unmask]> wrote:
> 
> The historical society I am working with has a whole bunch of photos and other documents such as posters and flyers that are either curling up on their own or have been rolled up.  What would be the safest but cheapest procedure (we are a small society with some money, but not much) to flattening them out?  The plan is to buy a map drawer and maybe some other cabinets later this year so we are definitely looking to correct this.  What would you guys recommend?  Thanks for any and all help.
> 
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