pre-expose
/ˌpriːɪkˈspəʊz/ /ˌpriːɛkˈspəʊz/verb
1 [with object] To expose to something beforehand or in advance.
2 [with object] Photography. To give a pre-exposure to (a film, plate, etc.).
Origin
Early 19th century; earliest use found in Jeremy Bentham (1748–1832), philosopher, jurist, and reformer. From pre- + expose.