Question: I am putting together a storage cabinet in which our small congregation will store its Torah between services, since we do not have a permanent shul. Can you tell me what optimal storage conditions for parchment are.
Answer: The most important considerations for storing a Torah scroll, as far as preservation is concerned, are constant temperature and constant humidity. Changes in temperature and humidity will cause the parchment and ink to contract and expand, and the parchment will contract/expand at a different rate from that of the ink--resulting in the ink separating from the parchment.
The optimal temperature is 70 degrees F; optimal humidity is 55%.
Also, the scroll should not be exposed to light, as light would cause the ink to fade.