Preserving Original WW2 Letters/Photos
I was just visiting my sister, and she reminded me that, when our mom passed 10 years ago, she took possession of a box of letters that my dad wrote to his parents while serving in the South Pacific during WW2. He was part of the 164th Infantry, and saw action on Guadalcanal (Purple Heart), New Guiney, the Philippines, and was part of the occupation force in Japan after the surrender. Some of the letters are heavily censored, but are historically very interesting.
My sister wants to preserve those letters - not just scan them (which we also plan to do) but to preserve the originals. The letters are in surprisingly good shape, especially considering they are over 70 years old, and somehow providing high quality, (and very lightweight) paper for the letters home was not a high priority for the military at the time.
She's doing the obvious stuff, keeping them in a cool, dry, dark place in a plastic container, and I know we should probably be using gloves when we handle them. As chance would have it, my dad was the company intelligence officer on Guadalcanal and was permitted to have a camera - the surviving pictures are in my possession, I have plans to scan those as well and perhaps lone the originals to a museum.
Anything else anyone can add as to how to preserve these historical originals as long as practical?