proofer

noun

1. A chamber used in baking that encourages fermentation of dough by yeast through warm temperatures and controlled humidity.
2. One who proofs.

   “There was a time when the half-tone photographer received considerable more in wages than did the proofer.”

   “The proofer would check under “Third” in the T's and find the The Third Annual Pablo Casals Festival.”

3. A printer used to make proofing copies that look like how it will come out of the press.

   “In graphic arts industry, in order to utilize color effectively, often a proofer is employed to simulate the reproductions of a press that is used to produce high-quality printed matters for clients.”