M0, "A"

Conventional color measurement: printed and solid-colored surfaces, process control in prepress and pressroom, creation of ICC output profiles

Spectral radiance factor without polarization filter under a gas filled tungsten incandescent lamp emitting nearly standard illuminant A (color temperature 2856 K ± 100 K resembling incandescent light as closely as possible) to simulate other types of light

380 nm and more (mandatory 400 nm and more) up to at least 700 nm

Can be supplemented mathematically later, if necessary

M1, "D50"

Physically correct color measurement: printed and solid colored surfaces, process control in prepress and pressroom, creation of high-quality ICC profiles for digital proofs and printing processes

Spectral radiance factor without polarization filter under a light source that physically simulates the standard illuminant D50 (color temperature 5003 K ± 100 K resembling artificial daylight with a as closely as possible) with the correct UV content

Excitation from approx. 300 nm, measurement from 380 nm (mandatory from 400 nm) to at least 700 nm

A UV source must be switched on in addition; the D50 spectral power distribution transition from UV to visible is as CIE-compliant as possible between 300 nm and 500 nm

M2, "UV Cut"

Color measurement while cutting out the UV content in the measuring light

Spectral radiance factor without polarization filter under a light source that generates or simulates any standard type illuminant without UV portion or, if necessary, cuts out the UV portion with a UV blocking filter

380 nm and more (mandatory 400 nm and more) up to at least 700 nm

Cut out or switched off

M1 — M2

Physically correct color measurement to display the effect of optical brightening agents (quantitatively in color measurement, qualitatively as differential spectrum): creation of high-quality ICC paper profiles, evaluation of fluorescent inks.

Measurements carried out one after the other: M1 and M2; comparison of M1 (D50 with UV portion in the measuring light) and M2 (here also D50, but without UV portion in the measuring light) carried out internally in the measuring device or externally by software.

see M1 and M2

Separate evaluation of the UV effect

M3, "polarization filter"

Densitometry: optical density (blackness), ink density (process inks), spectral density (spot colors); color measurement: wide gamut inks, effect pigment inks, ink recipe

Selective absorption factor (under RGB+V_vis filter set) or spectral absorption factor (with spectral measuring head), in each case with a polarization filter pair (in the irradiated and in the reflected light, crossing each other) under a light source simulating any standard illuminant

From maximally 420 nm up to at least 700 nm

Cut out or switched off