This chapter describes the three main categories of measuring instrument: densitometer, colorimeter, and spectrophotometer. Densitometers can be used to arrive at controlled or standard press conditions and also to measure metrics such as dot area and dot gain. A colorimeter can measure and compute CIE‐type color metrics and can be used to measure the XYZ values of a sample. A spectrophotometer does not measure the sample using any particular filter band; instead it measures the sample's full spectrum. A spectrophotometer can mathematically create a filter response as shown by the graphs, and therefore a spectrophotometer can provide all the measurement values of a colorimeter or a densitometer, but not vice versa. The chapter evaluates new generation smartphone and other low‐cost systems. It then explains inter‐instrument and inter‐model measurement differences. The different levels of instrument calibration are as follows: user‐level calibration; recertification; and traceability.


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    Title :

    Measuring Instruments


    Contributors:

    Published in:

    Publication date :

    2018-07-18


    Size :

    26 pages




    Type of media :

    Article/Chapter (Book)


    Type of material :

    Electronic Resource


    Language :

    English




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