| For performing automatic densitometric evaluation of ink density, instantly displaying scan results as easy-to-read graphic charts. Compile a running data base that allows sheet-to-sheet comparisons and SPC analysis to assure compliance with tolerance levels of a print job. The SDT automatically reads color bars of width as little as 1/16", finds the locations to be monitored, and takes complete sets of readings of density, halftone dot area, and Preucil trap. The SXY is a two dimensional scanning densitometer, taking readings on press sheets, and comparing them with reference values read from an OK sheet or entered manually. Job information from either can be saved on PC readable floppy diskettes as well as printed to hard copy to be kept as records of running the job. SPC statistical analysis requires consistent, reproducible readings, for which the SDT and SXY are naturals! State of the art technology makes either machine an important part of quality control computerized networks where data can be displayed and monitored at remote locations.
The SDT Scanning Densitometer can read almost any colorbar imaginable. Need a colorbar? We can supply one for you! For newspaper color control, the SDT has a software option that reads three-color gray balance strips as narrow as 1/16".
Specifications
SpecTrac™
Scanning Spectrophotometer
The Tobias SpecTrac has the ability to perform color measurements utilizing a new spectrophotometer head and is available as a retrofit option for Tobias SDT/SXY scanning densitometers.
The SpecTrac head has a diffraction grating-based design giving a full range response of 380nm to 700nm in 10nm intervals. In addition to the current densitometric readings of density, dot area, contrast, trap, hue error and grayness, the SpecTrak is able to perform the standard color measurements. These include CIE L* a* b* and associated delta E readings and L* C* h readings. Measurements are for the 2 degree and 10 degree standard observer and include illuminants A, D5000 and D6500; an additional feature allows the input of user defined illuminants. The densitometric functions may use either Status T or Status E responses.
The spectrophotometric
readings of a sheet are
presented as a bar chart and
associated tabular form
similar to the current density
displays. There is the facility
to step between the color data,
density data and three color
density data. Display of a spectral
curve and of color space information
of a sample is also available.
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Color Measurement