標準號：BS 3900-J6-1993
中文標準名稱：涂料試驗方法.第J6部分:粉末涂層試驗.用氣體比對測重計測定粉末涂層密度(參照法)
英文標準名稱：Methods of test for paints - Testing of coating powders - Determination of density of coating powders by gas comparison pyknometer (referee method)
標準類型：G50
發布日期：1993/4/15 12:00:00
實施日期：1993/4/15 12:00:00
中國標準分類號：G50
國際標準分類號：87.040
適用范圍：This part of ISO 8130 specifies a method for the de-termination of the density of coating powders using a gas comparison pyknometer. It can be used for all types of coating powder, is simple to carry out, but requires more expensive instrumentation than is of-ten used for density determinations. The density of coating powders can also be deter-mined 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 re-sults, particularly if the powder swells in contact with the displacement liquid used or the displace-ment liquid does not totally displace the air between the powder particles. The liquid displacement method is much slower in execution, less accurate and is only to be used if it can be shown that the same results will be obtained as for the gas com-parison pyknometer method.