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Significance and Use
6.1 One of the key properties for printing in the lab or on production equipment is the intensity of the color, color balance and uniformity. This test can be used to ensure that the proper amount of ink is transferred to the substrate by obtaining a target density value, in addition to determining whether the print is uniform by measuring the reflection density over a wide print area. This then allows the use of the print for controlled testing of other appearance properties, such as gloss and color, and performance properties, such as resistance to abrasion and chemicals.
6.3 Transfer of density readings from one set of inks to another, or from one substrate to another, carries a high risk of producing a color or tone shift. It is not in the scope of this test method to use density readings as digital proof of target points for printing process control.
1.3 This test method applies to prints made by any printing process on a flat surface, with reflection density values ranging from just above zero, on the unprinted substrate, through to around 2.5 for very dense prints.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E284 Terminology of Appearance
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ANSI StandardsCGATS.11-1999 Graphic Technology -- Certified Reference Materials for Reflection and Transmission Metrology - Documentation Requirements and Recommended Procedures CGATS.4-1993 Graphic Technology - Graphic Arts Reflection Densitometry Measurements -- Terminology, Equations, Image Elements and Procedures CGATS.6 Graphic Technology -- Specifications for Graphic Arts Printing PH2.17 Geometric Conditions for Reflection Density PH2.18 Spectral Conditions for the Measurement of Optical Density
Other StandardDIN16536-2:1986 Testing of prints and printing inks in graphic technology -- Colour density measurements on on-press or off-press prints
UNSPSC Code 60121800(Printing and drawing inks); 14121901(Standard newsprint)