The Braun Paxiscope 650 Projector is ideal for showing enlarged proofs as well as tracing or examing coins, notes, stamps, etc. at large size. No need to digitise and then project with a projector. Simply place the object under the lid &...
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Densitometer:
An instrument used to measure the optical density of a transmitting material, or the negative log of the reflectance of a reflecting material. They do not measure color, but rather indicate the percentage of a given area that is covered by halftone dots in density units or percentage dots. Densitometers are widely used in the graphic arts and photographic industries to ensure consistency and for process control. See Density.