UNE EN ISO 23900-4:2019
Pigments and extenders - Methods of dispersion and assessment of dispersibility in plastics - Part 4: Determination of colouristic properties and ease of dispersion of white pigments in polyethylene by two-roll milling (ISO 23900-4:2015)
Pigmentos y extendedores. Métodos de dispersión y evaluación de la dispersabilidad en plásticos. Parte 4: Determinación de las propiedades colorimétricas y de la facilidad de dispersión de pigmentos blancos en polietileno por calandrado con dos cilindros. (ISO 23900-4:2015).
| Označení normy: | UNE EN ISO 23900-4:2019 |
| Počet stran: | 12 |
| Vydáno: | 2019-06-12 |
| Status: | Norma |
UNE EN ISO 23900-4:2019
This part of ISO 23900 specifies a method of determining the colouristic properties of a test pigment in polyethylene (PE) relative to a standard, and the ease of dispersion DHPE of pigments from the differences in tinting strength of dispersing colouring materials under various conditions. The method is appropriate for use with white pigments. The ease of dispersion determined in this way is valid only for the dispersion equipment, dispersión conditions and dispersion medium being used. The use of test conditions differing from those specified can give different results; this applies both to the absolute magnitude and to the relation between values of the ease of dispersion of various pigments. The subscript DHPE is therefore used to designate the value obtained as specified in this part of ISO 23900.