ISO 787-23-1979 颜料和体质颜料的通用试验方法.第23部分:密度测定(用离心机消除夹带的空气)

标准号：ISO 787-23-1979
中文标准名称：颜料和体质颜料的通用试验方法.第23部分:密度测定(用离心机消除夹带的空气)
英文标准名称：General methods of test for pigments and extenders; part 23: determination of density (using a centrifuge to remove entrained air)
标准类型：G53
发布日期：1999/12/31 12:00:00
实施日期：1999/12/31 12:00:00
中国标准分类号：G53
国际标准分类号：87.060.10
适用范围：Displacement liquids of known density should be selected in which the material to be tested is insoluble, and which has good wetting properties and a low evaporation rate under vacuum. High-boiling aromatic or aliphatic hydrocarbons are suitable. The temperature, t, at which the determination is carried out affects the density of the displacement liquid; each weighing should be made at a constant temperature. The principle consists in weighing into a tared tube a quantity of a dried sample, wetting it with displacement liquid, centrifuging until the occluded air is removed and calculation of the density from the difference of masses.