EN ISO 787-1:2017 PDF

Name: EN ISO 787-1:2017 — General methods of test for pigments and extenders - Part 1: Comparison of colour of pigments (ISO 787-1:1982)
SKU: EN ISO 787-1:2017
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General methods of test for pigments and extenders - Part 1: Comparison of colour of pigments (ISO 787-1:1982)

Название (английский):

EN ISO 787-1:2017

General methods of test for pigments and extenders - Part 1: Comparison of colour of pigments (ISO 787-1:1982)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 8
Дата публикации:: 18 октября 2017 г.
Издание:: CEN EN 787 edition 1 version 1
ICS:: 87.060.10

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Описание (английский):

Procedure for comparing the colour of a coloured pigment with that of an agreed sample. The procedures described in this document are acceptable but the method using an automatic muller is the reference method. The binder is not specified. It shall be agreed between the interested parties. If no binder is agreed, linseed oil, complying with the specification in ISO 150, should be used. - Replaces ISO/R 787/1:1968.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 787-1:2017, titled General methods of test for pigments and extenders - Part 1: Comparison of colour of pigments, is a standardized procedure developed by CEN and ISO/TC 35 for assessing the colour consistency of coloured pigments. It specifies a comparison method between a test pigment and an agreed reference sample, ensuring reliable and reproducible colour evaluation. This standard replaces ISO/R 787/1:1968 and is widely recognized in the paint, coatings, and pigment manufacturing industries.

Key Topics

Scope: Defines a general method for comparing pigment colour using either an automatic or a hand-operated muller, focusing on visual and instrumental evaluation against an agreed standard.

Binder Use: The binder for pigment dispersion must be mutually agreed upon. If unspecified, refined linseed oil compliant with ISO 150 should be used, facilitating consistent sample preparation.

Apparatus and Materials: Utilizes tools such as:

Automatic muller with controlled force and rotational speed (reference method)
Hand muller or palette knife for manual dispersion
Standard substrates like glass or marble plates for sample spreading
Burette for accurate binder dosing

Sample Preparation: Detailed instructions on mixing pigment with binder to create uniform pastes, emphasizing consistency in paste thickness and texture for valid colour comparison.

Colour Comparison Procedure: Involves spreading pigment pastes side-by-side on substrates and comparing them under diffuse daylight or controlled light conditions per ISO 3668 guidelines. Optionally, colorimeters may be used by agreement.

Test Reporting: Mandates documentation of key parameters such as pigment identification, binder type, method used, test results, and any deviations, ensuring traceability and transparency.

Applications

Quality Control in Pigment Production: Ensures batch-to-batch colour consistency, vital for manufacturer reputation and product performance.

Paints and Coatings Industries: Helps manufacturers verify pigment colour matches specifications before formulation, preventing costly rework.

Research and Development: Supports pigment and extender formulation optimization by providing reliable colour comparison methods.

Contractual Agreements: Provides an objective means for suppliers and customers to agree on pigment colour standards, reducing disputes.

Regulatory Compliance: Assists companies in meeting quality standards and industry regulations related to pigments and colour quality in coatings and related products.

Related Standards

ISO 3668: Specifies methods for visual colour comparison of paints and varnishes, supplementing the comparison procedure defined in EN ISO 787-1.

ISO 150: Defines quality and testing for raw and refined linseed oil used as a binder in pigment testing.

ISO 842: Addresses sampling methods for raw materials like pigments to ensure representative testing samples.

Other parts of ISO 787 series, including:

Part 2: Determination of volatile matter
Part 5: Determination of oil absorption
Part 16: Comparison of relative tinting strength using an automatic muller These provide a comprehensive framework for pigment and extender testing beyond colour comparison.

Keywords: pigment colour comparison, pigment testing standards, automatic muller method, binder for pigments, linseed oil binder, quality control pigments, ISO pigment test methods, paint pigment evaluation, CEN pigment standards.

EN ISO 787-1:2017 PDF

Abstract

Похожие стандарты

Overview

Key Topics

Applications

Related Standards

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