Vorwort
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This document has been prepared in collaboration with the Technical Committee of ISO/TC 256 (Pigmente, dyes and Fillers) and the Technical Committee CEN/TC 298 (Pigments and Fillers) des Europäischen Komitees für Normung (CEN) in accordance with the Agreement on technical Cooperation between ISO and CEN (Wiener Abkommen).

The second edition cancelled and replaced the first edition (ISO 18314-2:215), which had been technically revised.

Die wichtigsten Änderungen sind wie folgt:

– The title has been changed to “Shadow Depth”;

— The terms and definitions in Article 3 are consistent with ISO 18451-1;

— The documents have been edited and revised, and the bibliography has been updated.

Eine Liste aller Teile in der ISO 18314 family can be found on the ISO website.

Any feedback or questions about this document should be directed to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

ISO 18314-2-2015 Analytical colorimetric method — Teil 2: Saunderson correction, solution to the Kubelka-Munk equation, coloring power, covering power

1 Reichweite
This document specifies Sanderson corrections for different measurement geometers and solutions to the Kubelka-Munk equations for hidden and transparent layers. It also specifies ways to calculate shading intensity based on different criteria, such as shadow depth, including residual chromatic aberration. Endlich, the method to determine the covering power is given.

Procedures for preparing samples for these measurements are not part of this document. They are agreed upon by the Parties or described in other national or international standards.

2 Normative Verweisungen
There is no normative reference in this document.

3 Begriffe und Definitionen
Für die Zwecke dieses Dokuments, Es gelten die folgenden Begriffe und Definitionen.

3.1 Coloring power

Color intensity

A measure of the colorant’s ability to color other materials because of its absorption capacity

[Quelle: ISO 18451-1:2019, 3.122]

3.2 Relative coloring power

Relative color intensity

The percentage ratio of the coloring strength of the colorant under test (3.1) to the coloring strength of the reference colorant

[Quelle: ISO 18451-1:2019, 3.105]

3.3 Coloring strength standard

A parameter that describes the coloring effect of a colorant based on its absorption

Notiz 1: The coloring strength standards used in this document are as follows:

— the value of Kubelka-Munk function at the maximum absorption;

— Weighted sum of Kubelka-Munk function values;

— trististimulus value Y;

— the smallest of the three stimulus values X, Y and Z;

– Shadow depth parameter B.

Notiz 2: Examples of other coloring strength parameters not used in this document are as follows:

— Unweighted sum of Kubelka-Munk function values;

— Chroma consists of three color coordinates (L*, a*, b*);

— Reflection coefficient at maximum absorption.

3.4 Residual color difference

When the tint intensity criterion (3.3) values are the same or equalized, the color difference that still exists between the reference sample and the test sample decreases in whiteness

Beispiel: Residual color difference is given by ΔE*.

3.5 Shadow Depth

Color depth

Measure the intensity of color perception that increases as chroma increases and decreases as brightness increases

Notiz 1: Colorants with the same shadow depth appear to have been prepared using colorants of the same concentration with the same coloring strength (3.1).

[Quelle: ISO 18451-1:2019, 3.26, geändert – The accepted terms “shadow depth” Und “color depth” have been added.

ISO 18314-2-2015 Analytical colorimetric method — Teil 2: Saunderson correction, solution to the Kubelka-Munk equation, coloring power, covering power

3.6 Standard Shadow depth

Standard shadow depth

Standard color depth

Standard clear

Conventionally specified shadow depth (3.5) Ebene

[Quelle: ISO 18451-1:2019, 3.113, geändert – The accepted terms “standard shadow depth” Und “standard color depth” have been added.

3.7 Covering Power

The ability of the coating to remove color or color difference from the substrate

Notiz 1: The German expressions “Deckkraft” Und “Deckfahigkeit” should be avoided.

Notiz 2: Der Begriff “coverage” is ambiguous, as it is used in some cases to refer to coverage and in others to the rate of spread. More precise terms covering power and propagation rate should always be used.

[Quelle: ISO 18451-1:2019, 3.47]

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