A chemical that's used to reduce the density of a processed negative, often referred to as Farmer's Reducer
A contrivance for reducing the dimensions of one part so as to fit it to another, as a reducing coupling, or a device for holding a drilling a chuck
A hydraulic device for reducing pressure and hence increasing movement, used to transmit the load from the hydraulic support of the lower shackle to the lever weighing apparatus in some kinds of heavy testing machines
Additive used to reduce or lower the viscosity of inks The term thinner is sometimes used as a term for reducer For plastisol inks these reducers can be either curable or not curable The use for either will be specified from the plastisol manufacturers' specification guidelines and should be followed exactly Failure to do so will result in print failures Many printers use curable reducers, to insure that print failures cannot occur, even if proper guidelines are not followed CAUTION: Solvents, like mineral spirits, are not recommended for plastisol except as a cleaner
a substance capable of bringing about the reduction of another substance as it itself is oxidized; used in photography to lessen the density of a negative or print by oxidizing some of the slackened silver