Een voorwoord
ISO (Internationale Organisatie voor Standaardisatie) is een mondiale federatie van nationale normalisatie-instellingen (ISO-lidorganisaties). De ontwikkeling van internationale normen wordt doorgaans uitgevoerd via technische ISO-commissies. Elke ledengroep die geïnteresseerd is in het onderwerp waarover een technische commissie is opgericht, heeft het recht om in de commissie vertegenwoordigd te zijn. Internationale organisaties, regeringen en ngo's die samenwerken met ISO zijn ook bij deze inspanning betrokken. ISO werkt nauw samen met de Internationale Elektrotechnische Commissie (IEC) over alle kwesties van elektrotechnische standaardisatie.

Deel 1 van de ISO/IEC-richtlijn beschrijft de procedures die zijn gebruikt om dit document te ontwikkelen, evenals de procedures die worden gebruikt voor verder onderhoud. In het bijzonder, Er moet aandacht worden besteed aan de verschillende goedkeuringscriteria die vereist zijn voor verschillende soorten ISO-documenten. Dit document is opgesteld in overeenstemming met de redactieregels van Deel 2 van de ISO/IEC-richtlijn (zie iso.org/directives).

Houd er rekening mee dat bepaalde elementen van dit document onderwerp kunnen zijn van octrooirechten. ISO is niet verantwoordelijk voor het identificeren van een of meer van dergelijke octrooirechten. Details of any patent rights identified during the development of the document will be in the profile and/or in the list of ISO patent claims received (zie iso.org/patents).

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

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

Voluntary interpretation, related standards and conformity assessment related ISO specific terminology and express the meaning of and the ISO in the technical barriers to trade (TBT) zich houden aan het principe van de Wereldhandelsorganisatie (WTO) informatie, please see the iso.org/iso/foreword.html.

This document is prepared by Technical Committee ISO/TC 35, Verven en vernissen, SC 9, Algemene testmethoden voor verven en vernissen.

The fifth edition eliminates and replaces the fourth edition (ISO 2808:2007), die technisch is herzien. The main changes from the previous edition are as follows:

Terms and definitions have been updated to ISO 4618 and ISO/IEC Guide 99;

— Revised principles;

— Add a white light interferometer as method 6C;

— Added the terahertz method as method 11;

– The existing methods have adapted to the current situation of metrology;

— Revised characteristics of methods and procedures in Appendix A;

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

– Information on the accuracy of each method in Appendix A has been adjusted to current standards;

— Updated references to test criteria and structural criteria in Appendix A;

— The original Article 7 measurement of film thickness on rough surfaces has been moved to Appendix B;

– Added Appendix C on factors affecting measurement accuracy when measuring wood.

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

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

Invoering
This document consistently enumerates the individual coatings applied in multilayer systems by referring to the first coating applied on the substrate as coating 1. Some other criteria refer to individual test methods, listed in reverse order.

1 Toepassingsgebied
This document describes the method used to measure the thickness of the coating applied to the substrate. The method used to determine the thickness of wet film, dry film, and uncured powder layer is described.

For each method described, this document provides an overview of the field of application, existing standards, and precision.

Information for measuring the thickness of the film on rough surfaces is given in Appendix B.

Information on measuring the thickness of wooden substrate films is given in Appendix C.

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

2 Normatieve referentiedocumenten
Wanneer in de tekst naar de volgende documenten wordt verwezen, een deel of de gehele inhoud ervan vormt de vereisten van dit document. Voor gedateerde referenties, alleen de geciteerde versie is van toepassing. Voor ongedateerde citaten, de nieuwe versie van het citatiedocument (inclusief eventuele herzieningen) is van toepassing.

ISO 3611, Geometric Product specification (GPS) — Dimensional measuring devices: micrometers for external measurements — Design and metrological characteristics

ISO 4618, Verven en vernissen – termen en definities

ISO 8503-1, Preparation of steel substrates before painting and related products-Surface roughness characteristics of sandblasted steel substrates — Deel 1: Specification and definition of an ISO surface roughness comparator for evaluation of sandblasted surfaces

3 termen en definities
Voor de doeleinden van dit document, de termen en definities gegeven in ISO 4618 en het volgende is van toepassing.

ISO en IEC onderhouden terminologiedatabases voor standaardisatie op de volgende adressen:

– ISO online browserplatform: iso.org/obp

– IEC Elektropedie: beschikbaar op electropedia.org/

3.1 Film thickness

The distance between the film surface and the substrate surface

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

3.2 Wet film thickness

The thickness of the wet coating material just applied, measured immediately after application

3.3 Dry film thickness

The thickness of the coating left on the surface after the coating is hardened

3.4 Uncured powder layer thickness

The thickness of the powder coating material just applied, measured immediately after coating and before baking

3.5 Related surface area

A part of an object that is or will be covered by a coating and that the coating is required for its maintainability and/or appearance

Invoernotitie 1: The measurement of this attribute is only used for the extended evaluation of film thickness measurement; See article 7, k) and l).

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

3.6 Testgebied

A representative part of the relevant surface area, within which an agreed number of single measurements are taken as spot checks

Invoernotitie 1: The measurement of this attribute is only used for the extended evaluation of film thickness measurement; See article 7, k) and l).

3.7 Measurement area

The area where a single measurement is made

Invoernotitie 1: The measurement of this attribute is only used for the extended evaluation of film thickness measurement; See article 7, k) and l).

3.8 Minimum local film thickness

The lowest value of the local film thickness found in the relevant surface area of a particular specimen

Invoernotitie 1: The measurement of this attribute is only used for the extended evaluation of film thickness measurement; See article 7, k) and l).

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

3.9 Maximum local film thickness

The maximum value of the local film thickness found in the relevant surface area of a particular specimen

Invoernotitie 1: The measurement of this attribute is only used for the extended evaluation of film thickness measurement; See article 7, k) and l).

3.10 Average film thickness

Arithmetic mean of all individual dry film thickness (3.3) in the test area or weight determination of thickness

Invoernotitie 1: The measurement of this attribute is only used for the extended evaluation of film thickness measurement; See article 7, k) and l).

3.11 Kalibratie

Under specific conditions, first step, the operation of establishing a relationship between the quantity value provided by the measurement standard with measurement uncertainty and the corresponding indication with relevant measurement uncertainty, second step, using this information to establish a relationship to obtain the measurement result of the indication

Opmerking 1: Calibration can be expressed in statements, kalibratie functies, calibration plots, calibration curves, or calibration tables. In sommige gevallen, het kan een additieve of multiplicatieve correctie omvatten voor een indicatie met bijbehorende meetonzekerheid.

Opmerking 2: Calibration should not be confused with adjustment of the measurement system, vaak ten onrechte genoemd “zelfkalibratie”, noch met kalibratieverificatie.

Invoernotitie 3: Typisch, the first step in the above definition alone is considered calibration.

[Bron: ISO/IEC-gids 99:2007, 2.39]

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

3.12 Confirmation

Provide objective evidence that a given project meets specific requirements

Voorbeeld 1: Confirm that the required given reference material is uniform for the relevant quantity values and measurement procedures until the mass of the measured part is 10 mg.

Voorbeeld 2: Confirm that the performance characteristics or legal requirements of the measurement system are met.

Voorbeeld 3: Confirm that the target measurement uncertainty can be met.

Opmerking 1: When applicable, measurement uncertainty should be considered.

Artikel Opmerking 2: Items can be, Bijvoorbeeld, processes, measurement procedures, materialen, compounds, or measurement systems.

Opmerking 3: Stated requirements can be, Bijvoorbeeld, meeting the manufacturer’s specifications.

Invoernotitie 4: Statutory metrological verification as defined in VIML, and conformity assessment in general, involves the inspection and marking of measurement systems and/or the issuance of verification certificates.

Opmerking 5: Validation should not be confused with calibration. Not every verification is a verification.

Opmerking 6: In chemistry, verifying the identity of the entity or activity involved requires describing the structure or nature of the entity or activity.

[Bron: ISO/IEC-gids 99:2007, 2.44]

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

3.13 Reference R M

The material, sufficiently homogeneous and stable with respect to the specified properties, has been determined to be suitable for its intended use in measurement or inspection of nominal properties

Invoernotitie 1: Examination of nominal attributes provides nominal attribute values and associated uncertainty. This uncertainty is not measurement uncertainty.

Opmerking 2: REFERENCE MATERIALS with or without specified quantity values can be used for measurement accuracy control, while only REFERENCE materials with specified quantity values can be used for calibration or measurement trueness control.

Opmerking 3: “Referentiematerialen” include materials embodying quantitative and nominal characteristics.

Voorbeeld 1: Sample reference with quantity:

A) water of specified purity whose dynamic viscosity is used to calibrate the viscometer;

B) Human serum without a quantitative value for the mass concentration of intrinsic cholesterol is used only as a control substance for measurement accuracy;

C) Fish tissue containing the specified mass fraction of dioxins to be used as calibrators.

Voorbeeld 2: Example of reference material embodying nominal characteristics:

A) a color card showing one or more specific colors;

B) a DNA compound containing a specific nucleotide sequence;

C) Urine containing 19-androstenedione.

Invoernotitie 4: Reference materials are sometimes incorporated into specially manufactured equipment.

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

Voorbeeld 3: A substance with a known triple point in a triple point cell.

Voorbeeld 4: Glass with known optical density in a transmission filter holder.

Voorbeeld 5: A uniform sized sphere mounted on a microscope slide.

Entry NOTE 5: Some REFERENCE MATERIALS specify quantities that are metrologically traceable to units of measurement outside the unit system. Such material includes vaccines designated as international units (IU) by the World Health Organization.

Opmerking 6: In a given measurement, a given reference material can only be used for calibration or quality assurance.

Invoernotitie 7: The specification of the reference material shall include its material traceability, indicating its origin and processing (Accred. Qual. Assur.:2006).

Entry note 8: ISO/REMCO has a similar definition but uses the term “measurement process” to mean “inspection” (ISO 15189:2007, 3.4), which covers the measurement of quantities and the inspection of nominal attributes.

Invoernotitie 9: Reference materials can be coating thickness standards or gaskets. A portion of the test sample can be used as a work-specific thickness standard if the contract parties agree.

[Bron: ISO/IEC-gids 99:2007, 5.13, gewijzigd – entry note 9 added.]

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

3.14 Aanpassing

Adjustment of measurement system

A set of operations performed on a measuring system so that it provides a prescribed indication corresponding to a given value to be measured

Opmerking 1: The types of adjustment of the measurement system include zero adjustment, offset adjustment and span adjustment (sometimes called gain adjustment) of the measurement system.

Opmerking 2: Adjustment of a measurement system should not be confused with calibration, which is a prerequisite for adjustment.

Opmerking 3: After the measurement system is adjusted, it is usually necessary to re-calibrate the measurement system.

Opmerking 4: Most digital measuring instruments can be adjusted on a thickness standard or gasket, where the thickness of the coating or gasket is known.

[Bron: ISO/IEC-gids 99:2007, 3.11, gewijzigd — opmerking 4 added, “adjustment” used as the first preferred term.]

ISO 2808-2019 “Determination of paint film thickness for color and varnishment”

3.15 Nauwkeurigheid

Accuracy of measurement

The degree of agreement between the measured value and the true quantity value

Opmerking 1: The concept of “measurement accuracy” is not a quantity and does not give a numerical quantity value. When smaller measurement error is provided, the measurement is said to be more accurate.

Opmerking 2: De voorwaarde “precision of measurement” should not be used to measure truthfulness and the term “precision of measurement” should not be used to “precision of measurement”, Echter, this is related to both concepts.

Invoernotitie 3: “Measurement precision” is sometimes understood to be attributed to the degree of consistent proximity between the measurements being measured.

[Bron: ISO/IEC-gids 99:2007, 2.13, gewijzigd — “nauwkeurigheid” is used as a preferred term.]

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