Färgindustrin

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 19 okt 2019
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This document specifies a method for determining the electrical conductivity and the electrical resistance of coating materials. The conductivity is usually measured for water-borne paints and varnishes, including electrodeposition coating materials, and the resistance is usually measured for solvent-borne paints and varnishes. If required, the resistivity of the coating material is calculated from either of these measurements. The method is applicable to products having a conductivity less than 5 μS/cm, corresponding to a resistivity greater than 200 kΩ⋅cm.

The conductivity of coating materials influences their processibility in the presence of an electric field. This is particularly important for electrodeposition paints and coating materials which are processed electrostatically.

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 23 okt 2019
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This document specifies a method for determining the film hardness by pushing pencils of known hardness over the film.

The test can be performed on a single coating of a paint, varnish or related product, or on the upper layer of a multi-coat system.

This rapid test has not been found to be useful in comparing the pencil hardness of different coatings. It is more useful in providing relative ratings for a series of coated panels exhibiting significant differences in pencil hardness.

The method is applicable only to smooth surfaces.

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 23 nov 2019
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This part of EN 12206 specifies requirements and the corresponding methods of test relating to the organic coating of aluminium and aluminium alloy extrusions, sheet and preformed sections for architectural purposes, using coating powders. It also describes:

a) the pretreatment of the substrate prior to the coating process;

b) the coating powder;

c) the coating process;

d) the final product.

Each item is dealt with separately in this part of EN 12206 so that any interested party can ensure compliance appropriate to its area of responsibility.

CAUTION — The procedures described in this standard are intended to be carried out by suitably trained and/or supervised personnel. The substances and procedures used in this method may be injurious to health if adequate precautions are not taken. Attention is drawn in the text to specific hazards. This standard refers only to technical suitability and does not absolve the user from statutory obligations relating to health and safety.

Ämnesområden: Färg och lack
Kommittébeteckning: SIS/TK 433 (Färg och lack)
Källa: CEN
Svarsdatum: den 4 dec 2019
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This document specifies methods for exposing coatings to fluorescent UV lamps, heat and water in apparatus designed to reproduce the weathering effects that occur when materials are exposed in actual end-use environments to daylight, or to daylight through window glass.

The coatings are exposed to different types of fluorescent UV lamps under controlled environmental conditions (temperature, humidity and/or water). Different types of fluorescent UV lamp may be used to meet all the requirements for testing different materials.

Specimen preparation and evaluation of the results are covered in other ISO documents for specific materials.

General guidance is given in ISO 16474-1.

NOTE Fluorescent UV lamp exposures for plastics are described in ISO 4892-3.