предговор
ИСО (Међународна организација за стандардизацију) је глобални савез националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака институција чланица заинтересована за предмет за који је основан технички комитет има право да буде заступљена у тој комисији. Међународне владине и невладине организације које су у вези са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електротехничке стандардизације.

Процедуре које се користе за израду овог документа и оне које се користе за даље одржавање описане су у Делу 1 ИСО/ИЕЦ директиве. Нарочито, обратите пажњу на различите стандарде одобрења који су потребни за различите типове ИСО докумената. Овај документ је израђен у складу са правилима уређивања у Дел 2 ИСО/ИЕЦ директиве (види исо.орг/дирецтивес).

Please note that certain contents of this document may be subject to patent rights. ИСО није одговоран за идентификацију било ког или свих таквих патената. Details of any patent rights identified during the preparation of the document will be in the introduction and/or list of patent claims received by ISO (see iso.org/patents).

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Voluntary, related standards and conformity assessment related ISO specific and express the meaning of terminology as well as in relevant ISO technical barriers to trade (ТБТ) adhere to the principle of the world trade organization (WTO) information, please refer to the iso.org/iso/foreword.html.

This document has been prepared in collaboration with the Technical Committee of ISO/TC 256 (Pigments, dyes and Fillers) and the Technical Committee CEN/TC 298 (Pigments and Fillers) of the European Committee for Standardization (CEN) in accordance with the Agreement on technical Cooperation between ISO and CEN (Vienna Agreement).

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

The main changes are as follows:

– 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.

A list of all the parts in the 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.

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

1 домет
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. Коначно, 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 references
There is no normative reference in this document.

3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.

3.1 Coloring power

Color intensity

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

[Извор: ИСО 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

[Извор: ИСО 18451-1:2019, 3.105]

3.3 Coloring strength standard

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

Белешка 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.

Белешка 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

Example: 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

Белешка 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).

[Извор: ИСО 18451-1:2019, 3.26, modified – The accepted terms “shadow depth” и “color depth” have been added.

ИСО 18314-2-2015 Analytical colorimetric method — Парт 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) ниво

[Извор: ИСО 18451-1:2019, 3.113, modified – The accepted terms “standard shadow depth” и “standard color depth” have been added.

3.7 Covering Power

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

Белешка 1: Немачки изрази “Непрозирност” и “Покривеност” треба избегавати.

Белешка 2: Термин “покривеност” 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.

[Извор: ИСО 18451-1:2019, 3.47]

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