A second or subsequent exposure.

Is overexposed one word or two?

verb (used with object), o·ver·ex·posed, o·ver·ex·pos·ing. to expose too much, as to the sun, cold, or light rays (often used reflexively): Be careful of overexposing yourself to the sun.

What does Explosure mean?

1 : the fact or condition of being exposed: such as. a : the condition of being presented to view or made known a politician seeks a lot of exposure. b : the condition of being unprotected especially from severe weather died of exposure.