Print Density and Ink Requirement
Ink requirement is defined as the amount of ink needed to print a unit area with a standard Solid Ink Density. For newsprint, the ISO 12647-3 specification is C 0.90, M 0.90, Y 0.90 and K 1.10, Status E, D50, 2o, density minus paper with Polarization filter. Ink requirement is measured as g/m2 (grams of ink required to print 1 m2 of paper)
Different paper substrates require different amount of ink to achieve the standard SID. A highly porous substrate generally requires higher amount of ink compared to a less porous substrate. Therefore, to study the ink mileage of different paper substrates, this test can be done on all the newsprint samples.
Ink requirement also depends upon the ink formulation and the colour strength of the pigments. From this test, the ink mileage of all the four process colours, when printed in the same paper, can be studied.
Read more about this topic: Paper And Ink Testing
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