Question about gun safes?

Question

Why do the directions for a fireproof gun safe state that it is not a proper storage place for CDs?

Is it a humidity issue? Chemical issue?

Is there anything that can be done in order to protect CDs to allow them to be stored in a fireproof gun safe?

Answer 1

Because it will still get hot enough inside a safe that the CDs will warp in fire. Also, cleaning guns requires a lot of solvents that emit fumes that could eat at the plastic over the data disc (under the plastic part you can see).