Final answer:
In the course of testing, a fire resistive safe designed for the protection of paper documents must maintain an interior temperature below the ignition temperature of paper.
Step-by-step explanation:
In the course of testing, a fire resistive safe designed for the protection of paper documents must maintain an interior temperature at not more than a certain threshold. This temperature threshold is typically determined based on the ignition temperature of paper, which is around 451 degrees Fahrenheit (233 degrees Celsius).
Keeping the interior temperature below this threshold ensures that the documents stored inside the safe won't catch fire in the event of a fire incident.
It's important to note that the specific temperature threshold may vary depending on different safety standards and regulations.