In your bookstacks, this means that when the pollutant gases move between the pages of a deacidified book only a small amount of these materials will be left to do potential damage to the paper. Secondly, and as important, this study points out the need to consider the effect of nitrogen dioxide exposure on paper. The concentration of sulfur dioxide in the air is being lowered in many parts of the world due to clean air programs. This could leave other pollutant gases such as nitrogen dioxide, which are harder to control, as the principal pollution source for airborne acidity in non-alkaline paper. Moreover, as Dr. Druzik has pointed out, the impact of this scenario on HVAC systems is important because the oxides of nitrogen are far more difficult to chemically filter out than sulfur dioxide.
Calcium carbonate is used as buffer.
For a report on the Frankfurt symposium on permanent paper, see the May 1990 Newsletter. The ongoing computer revolution makes the task of saving Government records for historical purposes more complex. The findings of the study and suggested recommendations will be of interest to the broader preservation and access community. Preservation Strategy, and Related Records Management Problems. 2nd and D Streets.