EN ISO 787-15:2019 PDF

Name: EN ISO 787-15:2019 — General methods of test for pigments and extenders - Part 15: Comparison of resistance to light of coloured pigments of similar types (ISO 787-15:2019)
SKU: EN ISO 787-15:2019
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General methods of test for pigments and extenders - Part 15: Comparison of resistance to light of coloured pigments of similar types (ISO 787-15:2019)

Название (английский):

EN ISO 787-15:2019

General methods of test for pigments and extenders - Part 15: Comparison of resistance to light of coloured pigments of similar types (ISO 787-15:2019)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 15
Дата публикации:: 25 сентября 2019 г.
Издание:: CEN EN 787 edition 2 version 1
ICS:: 87.060.10

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Описание (английский):

This document describes a general method of test for comparing the resistance to light of samples of similar types of coloured pigments (agreed reference pigment and test sample). Two methods of exposure are described in this document. In method A, the material is exposed under glass to natural light. In method B, the material is exposed to direct artificial light.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 787-15:2019 - General methods of test for pigments and extenders - Part 15: Comparison of resistance to light of coloured pigments of similar types (ISO 787-15:2019) defines a reproducible, comparative test method for assessing resistance to light / light fastness of coloured pigments. The standard describes how to prepare side‑by‑side specimens of an agreed reference pigment and a test sample, expose them to the same light conditions, and evaluate relative change in appearance.

Key points:

Two exposure methods: Method A (natural daylight exposure under glass) and Method B (direct artificial light).

Assessment is made by visual comparison of colour change between test sample and agreed reference pigment.

Key topics and requirements

Principle: Disperse test and reference pigments in the same binder (medium), apply to an agreed substrate, dry, expose side‑by‑side, and compare colour change.

Exposure methods:

Method A: Exposure under a single‑pane glass cover to natural daylight in a ventilated cabinet (protects from rain; specific glass transmittance characteristics are given).
Method B: Exposure to controlled artificial light (details of light source and apparatus are specified/ agreed).

Apparatus & materials:

Substrates (e.g., aluminium or rigid cardboard with white high‑gloss coating, or paper for mass‑tone prints).
Film applicator to lay down two wet films side‑by‑side (50–100 µm wet thickness) or apparatus for mass‑tone prints (~1.5 µm).
Opaque cover sheet, grey scale for assessing change (ISO 105‑A02), and agreed reference pigment.

Test procedure elements:

Sampling (clause 6), specimen preparation, exposure (clause 7) and reporting (clause 8).
Parties should agree supplementary details: reference pigment identity, binder composition, dispersion method, exposure angle, and artificial light source parameters.

Evaluation guidance: Comparisons are recommended when the reference pigment’s change corresponds approximately to grey scale grades 4 and 3 (ISO 105‑A02).

Applications and users

Pigment manufacturers and suppliers

Paint, coating and ink formulators

Quality control and test laboratories

R&D and product development teams for colour durability

Procurement/specification engineers assessing comparative light fastness

Practical uses:

Comparative quality control of pigment batches

Selecting pigments for outdoor and indoor applications based on relative light fastness

Supporting product claims and specification development

Complementing accelerated weathering and application‑specific tests

Related standards

ISO 105‑A02 - Grey scale for assessing change in colour

ISO 15528 - Sampling for paints, varnishes and raw materials

ISO 18451‑1 - Terminology for pigments, dyestuffs and extenders

CIE Publication No. 20 - Simulated solar radiation recommendations

Keywords: EN ISO 787-15:2019, resistance to light, light fastness, coloured pigments, agreed reference pigment, natural light exposure, artificial light exposure, pigment testing, grey scale.

EN ISO 787-15:2019 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 787-15:2019

General methods of test for pigments and extenders — Part 15: Comparison of resistance to light of coloured p…

BS EN ISO 10565:1998

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BS EN ISO 15528:2020

Paints, varnishes and raw materials for paints and varnishes. Sampling.

BS EN ISO 18451-1:2019

Pigments, dyestuffs and extenders. Terminology. General terms.