הקדמה
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ISO 6504-3-2019 – קביעת כוח המסתור של צבעים ולכות – חֵלֶק 3: קביעת כוח המסתור של בנייה, צבעי בטון ופנים

This document is prepared by Technical Committee ISO/TC 35, צבעים ולכות, Sub-Committee SC 9, שיטות בדיקה כלליות לצבעים ולכות.

The third edition eliminates and replaces the technically revised second edition (ISO 6504-3:2006). The main changes from the previous edition are as follows:

– The title and scope are limited to masonry and concrete coatings;

– Added the definition of light paint;

— Introduction of a new method applicable only to water-based coatings (Method C);

— The determination of mass per unit area of dry coating and the determination of actual spread rate have been deleted (ISO 3233-3 can be used instead);

– The reference to a fixed spread rate has been removed from the introduction, scope and test report (it was removed from the previous version of the program);

— Historical precision values for methods A and B have been removed from the specification section, and information on new inter-laboratory comparisons for Method C has been added to the informational annex, Annex A;

— Updated normative citation documents.

A list of all parts of the ISO 6504 ניתן למצוא סדרות באתר ISO.

ISO 6504-3-2019 – קביעת כוח המסתור של צבעים ולכות – חֵלֶק 3: קביעת כוח המסתור של בנייה, צבעי בטון ופנים

מבוא
When determining the hiding power of masonry and concrete coatings, there are two techniques that can be used for substrate preparation and measurement:

א) Apply to colorless transparent foil, and then place the coated foil on the black and white panels in turn;

ב) Direct application to black and white charts.

The spread rate is important for determining the covering power ratio. The spread rate can be determined according to ISO 3233-3 or according to another simplified method described in the standard specified in EN 13300 applicable to interior wall and ceiling coatings.

Because different operators using the same pull-down device will obtain coatings with significantly different thicknesses, this document describes an absolute opacity determination method. Collaborative trials between expert groups from multiple countries/regions have shown that reproducible results can be obtained by interpolating between measurements at two or more nearby measured coating thickness and including the specified spread rate to determine the covering power corresponding to the accurately specified spread rate. Stakeholders may agree on a specified transmission rate.

These methods are based on the observation that the hiding power is approximately a linear function of the inverse of the spread rate over a limited range of coating thickness that also corresponds to normal application of white or light paint. Thus, it is possible to interpolate between the results obtained with coatings of different thicknesses either graphically or by calculation with satisfactory accuracy.

ISO 6504-3-2019 – קביעת כוח המסתור של צבעים ולכות – חֵלֶק 3: קביעת כוח המסתור של בנייה, צבעי בטון ופנים

1 היקף היישום
This document specifies the method for determining the hiding power, white or light color tristimulus values Y and Y 10 greater than 25 paint coating applied to black and white charts or colorless transparent foil. In the latter case, the tristimulus values Y and Y 10 are measured on the black and white panels. Subsequently, the hiding power was calculated from these tristimulus values.

The document also provides for a simple method to calculate the diffusivity of coatings with low volatile matter content and low evaporation rates, such as interior wall and ceiling coatings specified in EN 13300.

2 מסמכי התייחסות נורמטיביים
When the following documents are referred to in the text, part or all of their contents constitute the requirements of this document. להפניות מתוארכות, רק הגרסה המצוטטת חלה. לציטוטים ללא תאריך, the new version of the citation document (כולל כל תיקונים) חל.

ISO 1513, צבעים ולכות — בדיקה והכנת דגימות בדיקה

ISO 2811 (כל החלקים), צבעים ולכות — קביעת צפיפות

ISO 3251, צבעים, varnishments and plastics – Determination of the content of non-volatile substances

ISO 3233-3:2015, Paints and varnishes-determination of percentage of nonvolatile matter by volume – חֵלֶק 3: Nonvolatile matter content, density of coating materials and density of solvents in coatings as determined in accordance with ISO 3251

ISO 15528, צבעים, לכות וחומרי גלם לצבעים ולכות — דְגִימָה

IN 13300, צבעים ולכות – Water-based paints and coating systems for interior walls and ceilings – מִיוּן

ISO 6504-3-2019 – קביעת כוח המסתור של צבעים ולכות – חֵלֶק 3: קביעת כוח המסתור של בנייה, צבעי בטון ופנים

3 מונחים והגדרות

For the purpose of this document, המונחים וההגדרות הבאים חלים.

ISO וחברת החשמל מחזיקות מאגרי מינוח לתקינה בכתובות הבאות:

– פלטפורמת גלישה מקוונת ISO iso.org/obp

– חברת החשמל אלקטרופדיה: זמין באתר electropedia.org/

3.1 Light paint

Coatings with tristimulus values Y and Y 10 greater than 25 were measured with a spectrophotometer on a black and white substrate

[מָקוֹר: ISO 6504-1:2019, 3.1]

3.2 Transmission rate

A certain amount of paint can cover the surface area to provide the desired thickness of the dry film

הערה 1: Expressed as m 2 /l or m 2 /ק"ג.

Entry note 2: See also application rate, actual spread rate, and theoretical spread rate.

[מָקוֹר: ISO 4618:2014, 2.238]

3.3 Actual seeding rate

Actual spread rate obtained on the specific substrate to be coated (3.2)

[מָקוֹר: ISO 4618:2014, 2.203]

3.4 Theoretical spread rate

Diffusivity based only on the volume of non-volatile matter (3.2)

[מָקוֹר: ISO 4618:2014, 2.256]

ISO 6504-3-2019 – קביעת כוח המסתור של צבעים ולכות – חֵלֶק 3: קביעת כוח המסתור של בנייה, צבעי בטון ופנים

3.5 Hiding Power

The ability of a coating to eliminate the color or chromatic aberration of a substrate

Entry Note 1: The German expressions “Deckkraft” ו “Deckfahigkeit” should be avoided.

Entry Note 2: התנאי “coverage” is ambiguous because it is used in some contexts to refer to coverability and in others to refer to transmission rate. More precise terms for covering power and spread rate should always be used.

[מָקוֹר: ISO 4618:2014, 2.138]

3.6 Tristimulus value (color stimulus)

במערכת נתונה של שלושה צבעים, the number of the three reference stimuli needs to match the color of the stimulus under consideration

הערה 1: In the CIE standard chrominance system, the tristimulus values are represented by the symbols X, י, Z and X 10, י 10, ז 10.

[מָקוֹר: ISO 11664‑2:2007, 3.14]

רק רכיב המידע הסטנדרטי זמין לציבור. לצפייה בתוכן המלא, תצטרך לרכוש את התקנים דרך ערוצים רשמיים.