DIN EN ISO 8130-2:2011-02

This part of ISO 8130 specifies a method for the determination of the density of coating powders using a gas comparison pyknometer. The method can be used for all types of coating powder and is simple to carry out. However, it requires more expensive instrumentation than is often used for density determinations. The density of coating powders can also be determined using the liquid displacement pyknometer method described in ISO 8130-3. The apparatus is relatively inexpensive, but the liquid displacement pyknometer method is liable to give erroneous results, particularly if the powder swells in contact with the displacement liquid used or the displacement liquid does not totally displace the air between the powder particles. The liquid displacement method is much slower in execution and less accurate. It is only used if the same results will be obtained as for the gas comparison pyknometer method. The Committee responsible for this standard is NA 002-00-07 AA "Allgemeine Prüfverfahren für Beschichtungsstoffe und Beschichtungen" ("General test methods for coating materials and coatings") at DIN.