увод
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 електричне 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, треба обратити пажњу на различите критеријуме одобрења који су потребни за различите типове ИСО докумената. This document has been drafted in accordance with the editing rules of ISO/IEC Directive Part 2 (види исо.орг/дирецтивес).

Please note that certain elements 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 found in the introduction and/or in the list of patent claims received by ISO (see iso.org/patents).

ИСО 12625-7-2021 Тоалетни папир и производи од санитарног папира – Парт 7: Measurement of brightness and chroma using D65/10° (outdoor daylight)

Any trade names used in this document are provided for the convenience of the user and do not constitute an endorsement.

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 by the Technical Committee ISO/TC 6 (Папир, board and pulp), SC 2 Subcommittees (Test methods and quality specifications for paper and paperboard) in collaboration with the Technical Committee CEN/TC 172 (Pulp, paper and paperboard) of the European Committee for Standardization (CEN). In accordance with the Technical Cooperation Agreement between ISO and CEN (Vienna Agreement).

The third edition cancels and replaces the second edition (ИСО 12625-7:2014), which has been technically revised.

Главне промене у односу на претходно издање су следеће:

– Alternative formulas in 11.2.1 have been removed because they are not related to tissue paper.

ИСО 12625-7-2021 Тоалетни папир и производи од санитарног папира – Парт 7: Measurement of brightness and chroma using D65/10° (outdoor daylight)

A list of all parts in the ISO 12625 series can be found on the ISO website.

Any feedback or questions regarding 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.

увести
Brightness and chrominance measurements can be made under a variety of lighting and viewing conditions. This document deals with D65/10° conditions, which refer to outdoor daylight.

ИСО 12625-15 takes into account the C/2° condition (indoor daylight). While both international standards deal with brightness and color, the results obtained are often different and uncorrelated.

ИСО 12625-7-2021 Тоалетни папир и производи од санитарног папира – Парт 7: Measurement of brightness and chroma using D65/10° (outdoor daylight)

Optical measurement is affected by the geometry of the instrument used and the texture of the material. The instrument design used in accordance with this document and the routines used for calibration are specified in ISO 2469 и ИСО 11475.

Optical properties are related to the visual appearance of the material. Стога, although optical properties are inherent to tissue paper, they are not functional properties.

Luminance should not be confused with an optical property called CIE whiteness, which is based on reflectance data obtained over the entire visible spectral range (VIS), while luminance measurements are limited to the blue region of the VIS.

Because of its importance to some countries, three different test methods have been developed to determine the optical properties:

– This document, 12625-7.ИСО;

—ISO 12625-15;

– ИСО 12625-16.

ИСО 12625-7-2021 Тоалетни папир и производи од санитарног папира – Парт 7: Measurement of brightness and chroma using D65/10° (outdoor daylight)

1 Домет
This document specifies an instrumental test procedure for determining the brightness and color of tissue paper and tissue products observed under outdoor daylight conditions. It also provides specific instructions for the preparation of specimens (single layer, multi-layer products) and the optical measurement of products, where special precautions may be required.

Note that properties called ISO brightness and chroma at C/2° (indoor daylight) are measured using instruments adjusted to much lower UV content than specified in this document. ИСО 12625-15 describes ISO brightness and chromaticity measured using C/2° (indoor daylight).

2 Normative references
The following files are referenced in text in a manner that constitutes part or all of the requirements of this document. За датиране референце, примењује се само наведена верзија. For undated references, a new version of the reference (укључујући све ревизије) примењује.

ИСО 186, Папир и картон – sampling to determine average quality

ИСО 187, Папир, board and pulp – Standard atmospheres for conditioning and testing and procedures for monitoring sample atmospheres and conditioning

ИСО 2469, Папир, board and pulp – Measurement of diffuse reflectance coefficient (diffuse reflectance coefficient)

ИСО 4094, Папир, Board and Pulp – General requirements for laboratory capabilities authorized to publish Level 3 optical reference transfer standards

ИСО 11475:2017, Папир и картон – Determination of CIE whiteness, D65/10 degrees (outdoor daylight)

ISO/CIE 11664-4, colorimetric method – Парт 4: CIE 1976 L*a*b* Color space

ИСО 12625-7-2021 Тоалетни папир и производи од санитарног папира – Парт 7: Measurement of brightness and chroma using D65/10° (outdoor daylight)

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

ISO and IEC maintain terminology databases for standardization at the following addresses:

– ISO Online browsing platform: available at iso.org/obp

– IEC electronic encyclopedia: доступно на елецтропедиа.орг/

3.1 Diffuse reflection radiation coefficient R

The ratio of radiation reflected and emitted from an object to radiation reflected from a good reflection diffuser under the same diffuse illumination and normal detection conditions

Белешка 1: The ratio is usually expressed as a percentage.

[Извор: ИСО 2469:2014, 3.2]

ИСО 12625-7-2021 Тоалетни папир и производи од санитарног папира – Парт 7: Measurement of brightness and chroma using D65/10° (outdoor daylight)

3.2 Inherent diffuse reflection radiation coefficient R∞

The diffuse reflection radiation coefficient (3.1) of thickness to an opaque material layer or pad, тј. increasing the thickness of the pad by doubling the amount of paper, results in no change in the measured radiation coefficient

Белешка 1: The radiation coefficient of a single opaque sheet depends on the background, not the material properties.

Белешка 2: The ratio is usually expressed as a percentage.

[Извор: ИСО 2469:2014, 3.3]

3.3 Reflectivity coefficient

The flux reflected in the direction of a given cone with its vertex at a surface element is the quotient of the flux reflected in the same direction by a reflection diffuser equally irradiated or illuminated

Белешка 1: The ratio is usually expressed as a percentage.

Белешка 2: This term should only be used when the test material is known not to emit light (fluorescence).

[Извор: CIE S 017 ILV: 2020, 17-24-070]

3.4D65 brightness

The inherent diffuse radiation coefficient (3.2) is measured using a reflectormeter with the characteristics described in ISO 2469, equipped with a filter with an effective wavelength of 457nm (half-bandwidth of 44nm) or corresponding function, and adjusted so that the UV content of the radiation incident on the sample under test corresponds to the UV content of the CIE standard light source D65

Белешка 1: The weighting factors given in ISO 2470-2 describe the filtering function more fully.

ИСО 12625-7-2021 Тоалетни папир и производи од санитарног папира – Парт 7: Measurement of brightness and chroma using D65/10° (outdoor daylight)

3.5 tristimulus value

Икс 10, И 10, Z 10

In a given three-color system, the amount of reference color stimulus is needed to match the color of the stimulus under consideration

Белешка 1: In ISO 5631-2, the CIE standard light source D65 and the CIE 1964 (10°) standard observer are used to define the tricolor system.

Белешка 2: Subscript 10 is used to conform to the CIE convention that when using the CIE 1964 (10°) standard colorimetric viewer, the tristimulus unit has subscript 10.

[Извор: CIE S 017 ILV: 2020, 17-23-038]

3.6 Color (D65/10°)

Based on the L*, a*, and b* values of the CIELAB 1976 system sample described in ISO/CIE 11664-4, Corresponding to the CIE standard light source D65 described in ISO 11664-2 and the CIE 1964 standard colorimetric viewer described in ISO/CIE 11664-1, determined by measurement under the conditions specified in ISO 5631-2

Белешка 1: The quantity L* is a measure of the brightness of the test piece, where L* = 0 corresponds to black and L* = 100 is defined by a good reflection diffuser. Visually, the quantities a* and b* represent the red-green and yellow-blue axes in the color space, редом, such that

– +a* is a measure of the redness of the test piece,

— -a* is a measure of the greenness of the test piece.

– +b* is a measure of the degree of yellowing of the test piece,

– -b* is a measure of the blueness of the test component, и

– If both a* and b* are equal to zero, the specimen is gray.

Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.