BS EN ISO 4628-7:2016 - Paints and varnishes. Evaluation of degradation of coatings. Designation of quantity and size of defects, and of intensity of uniform changes in appearance. Assessment of degree of chalking by velvet method

BS EN ISO 4628-7:2016

Paints and varnishes. Evaluation of degradation of coatings. Designation of quantity and size of defects, and of intensity of uniform changes in appearance. Assessment of degree of chalking by velvet method

Status : Current   Published : February 2016

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This part of ISO 4628 specifies a method suitable, in particular, for rating the degree of chalking on white or coloured exterior coatings and coating systems on rough surfaces (i.e. those having a roughness greater than segment 4 of the reference comparator G as described in ISO 8503‑1).

The test method specified can also be used for the assessment of the degree of chalking of coatings and coating systems on smooth surfaces, but the method specified in ISO 4628‑6:2011 is preferable for this purpose.

The test method is applicable to coatings and coating systems on mineral substrates, e.g. fibre cement, brick, concrete, and renderings, independent of the structure of the surface. The method can be used quite effectively by experienced operators and is recommended for laboratory use as well as for on-site evaluation.

NOTE 1

When a reference to this test method is included in specifications, the test conditions (i.e. weathering method and substrate) have to be agreed between the interested parties.

NOTE 2

The method described in this part of ISO 4628 is a relative ranking method and is therefore not suitable for use in agreements between parties. See, however, the Note to Table 1.

NOTE 3

Refer to ISO 4628‑1 for the designation system for quantity and size of defects and the intensity of changes in appearance of coatings, as well as general principles of the system.




Standard NumberBS EN ISO 4628-7:2016
TitlePaints and varnishes. Evaluation of degradation of coatings. Designation of quantity and size of defects, and of intensity of uniform changes in appearance. Assessment of degree of chalking by velvet method
StatusCurrent
Publication Date29 February 2016
Normative References(Required to achieve compliance to this standard)ISO 13076
Informative References(Provided for Information)ISO 4628-1, ISO 4628-6, ISO 8503-1
ReplacesBS EN ISO 4628-7:2003, BS 3900-H7:2003
International RelationshipsEN ISO 4628-7:2016,ISO 4628-7:2016
Draft Superseded By14/30301174 DC
DescriptorsWeathering, Coatings, Degradation, Laboratory testing, Grades (quality), Ageing (materials), Field testing, Deterioration, Defect counting, Environmental testing, Defects, Varnishes, Paints, Particulate materials, Surface defects
ICS87.040
Title in FrenchPeintures et vernis. Évaluation de la dégradation des revêtements. Désignation de la quantité et de la dimension des défauts, et de l'intensité des changements uniformes d'aspect. Évaluation du degré de farinage selon la méthode du morceau de velours
Title in GermanBeschichtungsstoffe. Beurteilung von Beschichtungsschäden. Bewertung der Menge und der Größe von Schäden und der Intensität von gleichmäßigen Veränderungen im Aussehen. Bewertung des Kreidungsgrades nach dem Samtverfahren
CommitteeSTI/10
ISBN978 0 580 86613 5
PublisherBSI
FormatA4
DeliveryYes
Pages14
File Size1.251 MB
Price£110.00


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