| http://www.w3.org/ns/prov#value | - The interference particles according to the invention are characterized by a volumetric mean size generally of less than 40 ??m, more particularly less than 30 ??m, especially less than 20 ??m and in particular less than 15 ??m, measured with a laser granulometer, for instance the Mastersizer 2000?? machine from Malvern and the BI90+?? machine from Brookhaven Instrument Corporation.
|
