Färgindustrin

Ämnesområden: Pigment och fyllmedel
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 20 apr 2021
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This document specifies a formalism for the calculation of the illuminant metamerism of solid surface colours. It cannot be applied to colours of effect coatings without metrical adaptation.

This document only covers the phenomenon of metamerism for change of illuminant, which has the greatest meaning in practical application. In the case of chromaticity coordinates of a pair of samples under reference conditions that do not exactly match, recommendations are given on which correction measures are to be taken. Regarding the reproduction of colours, the metamerism index is used as a measure of quality in order to specify tolerances for colour differences between a colour sample and a colour match under different illumination conditions.

The quantification of the illuminant metamerism of pairs of samples is formally performed by a colour difference assessment, for which tolerances that are common for the evaluation of residual colour differences can be used.

NOTE In the colorimetric literature and textbooks, the term geometric metamerism is sometimes used for the case that two colours appear to be the same under a specific geometry for visual assessment and selected standard observer and standard illuminant pair, but is perceived as two different colours at changed observation geometry. The term geometric metamerism is different to metamerism described in this document.

Ämnesområden: Målning
Kommittébeteckning: SIS/TK 146 (Korrosion)
Källa: CEN
Svarsdatum: den 24 maj 2021
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This International Standard specifies requirements and methods of test for liquid epoxy paints and internal coatings of such paints in steel pipes and fittings for the conveyance of non-corrosive gas. It also deals with the application of the paint. Other paints or paint systems are not excluded provided they comply with the requirements given in this International Standard. The coating consists of one layer, which is normally shopapplied on blast-cleaned steel by airless spray or other suitable spraying techniques. The applied and cured paint film must be smooth to give the desired reduction in friction. Brush application is only used for small repair jobs.

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 1 jun 2021
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This document gives guidelines on how to perform accelerated cyclic electrochemical technique (ACET) with organic protective coatings on metals.

This document specifies the execution of an ACET test and the considerations relative to the samples and electrochemical cell, test parameters and procedure.

This document also provides guidelines for the presentation of experimental results such as Bode plots and relaxation curves and other type of information obtained.

Some typical examples are shown in Annex A.

Ämnesområden: Färg och lack; Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 1 jun 2021
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This document specifies a general system for the classification of paints and varnishes for interior walls and ceilings for the decoration of new and old, coated and uncoated surfaces.