Digital BW, The Print

Paul,

We sometimes forget that the carbon dioxide in the air (much of which was 
there long before man came along - indeed, without it man would not have 
come along!) dissolves in water to form carbonic acid - a weak acid. So 
unless water and carbon dioxide are excluded, most things will tend to 
become acid.

Bob Frost.

----- Original Message ----- 
From: "Paul Roark" <paul.roark@...>


I've
tested my old fiber prints and found that the atmospheric acids from inside
my file cabinet were turning the un-mounted fiber prints yellow.  My Abbey
acid test pen confirmed that they had become acidic.