James, I love my CPAP too. As for preservation, why preserve polaroids
when you could print plat or pal?
On 2/13/14, 6:13 AM, James Schenken wrote:
It's commonly thought that Nitrogen is inert. Not so, consider Nitric Acid, Nitrogen Sulphide, etc among the compounds that form with Nitrogen. What makes it useful in this context is that it is not an oxidizer so it doesn't readily react with the usual suspects in art and photography.
Storage in nitrogen excludes Oxygen and other corrosive gases, doesn't react at usual storage temperatures, and is cheap.
For completely nonreactive storage, Argon is the gas of choice and is used extensively in the National Archives for the most sensitive documents.
CPAP Therapy is a way to live.
On Feb 12, 2014, at 7:53 PM, karl shah-jenner <shahjen@xxxxxxxxxxxx> wrote:
The way to store Polaroids is in nitrogen. Why? I guess to prevent them from fading,etc. and if not that, I have no idea.
Nitrogen being inert won't react with the photographs and it'll displace other reactive gasses so there's that. It'll also prevent biotic damage too since none of the usual biological means of destruction survives in such an environment.. It won't however stop light or any other form of radiation inducing changes to the dyes (of course). The only potential downside I can see is the potential for desiccation unless they humidify the nitrogen - but then I don't know what effects desiccation would have on polaroid photographs
k
