panimula
ISO (International Organization para sa Standardisasyon) ay isang pandaigdigang alyansa ng mga pambansang pamantayan katawan (Mga katawan ng miyembro ng ISO). Ang pagbuo ng mga internasyonal na pamantayan ay karaniwang isinasagawa sa pamamagitan ng ISO teknikal na komite. Ang bawat institusyon ng miyembro na interesado sa isang paksa kung saan itinatag ang isang teknikal na komite ay may karapatang kumatawan sa komiteng iyon. Ang mga internasyonal na organisasyon ng pamahalaan at di pamahalaan na nakikipag ugnayan sa ISO ay kasangkot din sa gawaing ito. ISO ay gumagana nang malapit sa International Electrotechnical Commission (IEC) sa lahat ng bagay ng electrical standardization.

Ang mga pamamaraan na ginamit upang bumuo ng dokumentong ito at ang mga ginagamit para sa karagdagang pagpapanatili ay inilarawan sa Bahagi 1 ng Direktiba ng ISO / IEC. Sa partikular na, pansin ay dapat bayaran sa iba't ibang mga pamantayan sa pag apruba na kinakailangan para sa iba't ibang uri ng mga dokumento ng ISO. Ang dokumentong ito ay drafted alinsunod sa mga patakaran sa pag edit ng ISO / IEC Directive Part 2 (tingnan iso.org/directives).

Mangyaring tandaan na ang ilang mga elemento ng dokumentong ito ay maaaring sumailalim sa mga karapatan sa patent. Ang ISO ay hindi mananagot para sa pagtukoy ng anuman o lahat ng naturang patente. Ang mga detalye ng anumang mga karapatan sa patent na natukoy sa panahon ng paghahanda ng dokumento ay matatagpuan sa pagpapakilala at / o sa listahan ng mga claim ng patent na natanggap ng ISO (tingnan iso.org/patents).

ISO 12625-7-2021 “Mga produkto ng tissue paper at tissue paper – Pagpapasiya ng mga optical properties – Bahagi 7 Measurement of brightness and chroma using D65/10° (outdoor daylight)”

Ang anumang mga pangalan ng kalakalan na ginamit sa dokumentong ito ay ibinigay para sa kaginhawahan ng gumagamit at hindi bumubuo ng isang endorsement.

Kusang loob, kaugnay na pamantayan at pag alinsunod pagtatasa kaugnay ISO tiyak at ipahayag ang kahulugan ng mga terminolohiya pati na rin sa mga kaugnay na ISO teknikal na hadlang sa kalakalan (TBT) sumunod sa prinsipyo ng world trade organization (WTO) impormasyon, paki refer po sa iso.org/iso/foreword.html.

This document has been prepared by the Technical Committee ISO/TC 6 (Papel, board at 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 (Kasunduan sa Vienna).

Ang ikatlong edisyon ay kinakansela at pinalitan ang ikalawang edisyon (ISO 12625-7:2014), na kung saan ay teknikal na binago.

Ang mga pangunahing pagbabago mula sa nakaraang edisyon ay ang mga sumusunod:

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

A list of all parts in the ISO 12625 serye ay maaaring matagpuan sa ISO website.

ISO 12625-7-2021 “Mga produkto ng tissue paper at tissue paper – Pagpapasiya ng mga optical properties – Bahagi 7 Measurement of brightness and chroma using D65/10° (outdoor daylight)”

Anumang feedback o mga katanungan tungkol sa dokumentong ito ay dapat na idirekta sa pambansang pamantayan ng katawan ng gumagamit. Ang kumpletong listahan ng mga institusyong ito ay matatagpuan sa iso.org/members.html.

ipakilala ang
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.

ISO 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.

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 at ISO 11475.

Optical properties are related to the visual appearance of the material. Kaya nga, 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.

ISO 12625-7-2021 “Mga produkto ng tissue paper at tissue paper – Pagpapasiya ng mga optical properties – Bahagi 7 Measurement of brightness and chroma using D65/10° (outdoor daylight)”

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

– Ang dokumentong ito, 12625-7.ISO;

—ISO 12625-15;

– ISO 12625-16.

1 Saklaw
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. ISO 12625-15 describes ISO brightness and chromaticity measured using C/2° (indoor daylight).

ISO 12625-7-2021 “Mga produkto ng tissue paper at tissue paper – Pagpapasiya ng mga optical properties – Bahagi 7 Measurement of brightness and chroma using D65/10° (outdoor daylight)”

2 Mga reperensyang normatibo
The following files are referenced in text in a manner that constitutes part or all of the requirements of this document. Para sa mga petsang sanggunian, ang binanggit na bersyon lamang ang nalalapat. Para sa mga walang petsang sanggunian, isang bagong bersyon ng sanggunian (kasama ang anumang mga rebisyon) angkop.

ISO 186, Papel at pisara – sampling upang matukoy ang average na kalidad

ISO 187, Papel, board at pulp – Standard atmospheres para sa conditioning at pagsubok at pamamaraan para sa pagsubaybay sa sample atmospheres at conditioning

ISO 2469, Papel, board at pulp – Measurement of diffuse reflectance coefficient (diffuse reflectance coefficient)

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

ISO 11475:2017, Papel at pisara – Determination of CIE whiteness, D65/10 degrees (outdoor daylight)

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

3 Mga tuntunin at kahulugan
Para sa mga layunin ng dokumentong ito, Ang mga sumusunod na termino at kahulugan ay nalalapat.

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

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

[Pinagmulan: ISO 2469:2014, 3.2]

3.2 Inherent diffuse reflection radiation coefficient R∞

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

ISO 12625-7-2021 “Mga produkto ng tissue paper at tissue paper – Pagpapasiya ng mga optical properties – Bahagi 7 Measurement of brightness and chroma using D65/10° (outdoor daylight)”

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

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

[Pinagmulan: ISO 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

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

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

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

ISO 12625-7-2021 “Mga produkto ng tissue paper at tissue paper – Pagpapasiya ng mga optical properties – Bahagi 7 Measurement of brightness and chroma using D65/10° (outdoor daylight)”

3.4D65 kaliwanagan

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, at inayos upang ang UV nilalaman ng radiation insidente sa sample sa ilalim ng pagsubok ay tumutugma sa UV nilalaman ng CIE standard light source D65

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

3.5 tristimulus value

X 10, Y 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

Tala 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.

Tala 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.

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

ISO 12625-7-2021 “Mga produkto ng tissue paper at tissue paper – Pagpapasiya ng mga optical properties – Bahagi 7 Measurement of brightness and chroma using D65/10° (outdoor daylight)”

3.6 Kulay (D65/10o)

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

Tala 1: Ang dami L* ay isang sukatan ng liwanag ng piraso ng pagsubok, kung saan L* = 0 tumutugma sa itim at L* = 100 is defined by a good reflection diffuser. Biswal na, the quantities a* and b* represent the red-green and yellow-blue axes in the color space, ayon sa pagkakabanggit, such that

– +A* ay isang sukatan ng pamumula ng piraso ng pagsubok,

— -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, at

– If both a* and b* are equal to zero, ang specimen ay kulay abo.

Ang standard information section lamang ang pampubliko. Upang makita ang buong nilalaman, kailangan mong bilhin ang pamantayan sa pamamagitan ng mga opisyal na channel.