Noun

(en noun)

Something which retards or slows.

The substance acted as a retarder to the chemical reaction because it radically changed the pH.

Noun

(en noun)

A chamber used in baking that encourages fermentation of dough by yeast through warm temperatures and controlled humidity.

One who proofs.

* {{quote-journal

, year=1913 , author=Louis Fader , title=The Cost of Production and its Relation to Salesmanship and Profit , journal=Process: the photomechanics of printed illustration , volume=20 , issue=237 , chapter= citation , isbn= , page=238 , passage=There was a time when the half-tone photographer received considerable more in wages than did the proofer. }}

* {{quote-book

, year=1997 , author=John Leverence , title=And the winner is--: using awards programs to promote your company , chapter= citation , isbn=1563431475 , page=196 , passage=The proofer would check under “Third” in the T's and find the The Third Annual Pablo Casals Festival.}}

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

* {{quote-journal

, year=2003 , author=Mei-Chun Lo, Yui-Liang Chen, Pei-Li Sun, and Ya-Hui Chiang. , title=The Color Rendering Between a Color Proofer and Printing Press , journal=Proceedings AIC 2003 Bangkok: Color Communication and Management , chapter= citation , isbn=9741325169 , page=181 , passage=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. }}