Pigments and extenders. Methods of dispersion and assessment of dispersibility in plastics. Determination of colouristic properties and ease of dispersion of black and colour pigments in polyethylene by two-roll milling
颜料和填充剂 塑料中分散性的评估和分散方法 用双辊碾磨法测定黑色和彩色颜料在聚乙烯中的着色性能和易分散性
BS ISO 23900-3:2015 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.Cross References:ISO 787-24:1985ISO 15528ISO 18314-1EN 12877-1All current amendments available at time of purchase are included with the purchase of this document.