Entertainment / Photography / Reducers: Solutions which remove silver from negatives and prints. They are used to diminish density and alter contrast on a photographic emulsion.
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Science / Tides and Currents / Tide Reducers: Height corrections for reducing soundings to chart datum (MLLW). A tide reducer represents the height of the water level at a given place and time relative to chart datum. Tide reducers are obtained f MORE
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