ISO 23900-3:2015 PDF

Scope: This part of ISO 23900 specifies a method of determining in polyethylene (PE) the colouristic properties of a test pigment relative to a standard, and the ease of dispersion DHPE of pigments from the differences in colour strength on dispersing colouring materials under various conditions. Method A is appropriate for use with organic powder pigments and carbon black pigments in powder form, many of which are subject to compaction (reagglomeration under pressure), for inorganic pigments in powder form and for pigment preparations in powder or flake form. Method B is appropriate for testing pigments and pigment preparations in granular form and for inorganic pigments in any form. The ease of dispersion determined in this way is valid only for the dispersion equipment, dispersion conditions and dispersion medium being used. The use of test conditions differing from those specified may 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.

ISO 23900-3:2015 Referenced Document

EN 12877-1:1999 Colouring materials in plastics - Determination of colour stability to heat during processing of colouring materials in plastics - Part 1: General introduction
ISO 15528:2013 Paints, varnishes and raw materials for paints and varnishes.Sampling
ISO 18314-1:2015 Analytical colorimetry - Part 1: Practical colour measurement*， 2015-06-01 Update
ISO 787-24:1985 General methods of test for pigments and extenders; Part 24 : Determination of relative tinting strength of coloured pigments and relative scattering power of white pigments; Photometric methods

2015 ISO 23900-3:2015 Pigments and extenders - Methods of dispersion and assessment of dispersibility in plastics - Part 3: Determination of colouristic properties and ease of dispersion of black and colour pigments in polyethylene by two-roll milling