There are THREE parts to the assignment.
1. Using the sample hygrothermograph data provided, draw conclusions about the conditions
in the rare book storage vault (“Deck 17”).
a. Are the conditions acceptable for storage of rare books in leather bindings, parchment
manuscripts and photographs?
b. Do the data indicate anything about how the HVAC system is performing? Describe any
problems you see and suggest explanations if you can. Don’t forget to consider the dew
point graph and what it tells you about RH control.
c. Are there any specific actions which should be taken to protect the vulnerable materials
stored in the space?
2. Another institution wishes to borrow an important watercolor painting in your collection. It will
only be exhibited for one month (30 days), but at light levels of 20 footcandles, or 200 lux.
Considering that the usual allowable limit of light exposure for your institution is 90 days at 5
footcandles, will the requested time exceed normal cumulative exposure? Explain why, using
lux/hours in your calculations.
3. Photographs in your cold vault are stored at 50 degrees F. Will condensation be a danger when
they are brought out to the reading room where the conditions are 72 degrees F and 50% RH? Use
the attached psychrometric chart to determine your answer and explain your reasoning. In any
situation where condensation was a danger because of removing items from cold storage, what could
you do to prevent damage?
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