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RS ISO 1183-1: 2025
Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion method, liquid pycnometer method and titration method

Abstract

This document specifies three methods for the determination of the density of non-cellular plastics in the
form of void-free moulded or extruded objects, as well as powders, flakes and granules.
— Method A: Immersion method, for solid plastics (except for powders) in void-free form.
— Method B: Liquid pycnometer method, for particles, powders, flakes, granules or small pieces of
finished parts.
— Method C: Titration method, for plastics in any void-free form.
NOTE Density is frequently used to follow variations in physical structure or composition of plastic materials.
Density can also be useful in assessing the uniformity of samples or specimens. Often, the density of plastic materials
depend upon the choice of specimen preparation method. When this is the case, precise details of the specimen
preparation method are intended to be included in the appropriate material specification. This note is applicable to all
three methods.
Annex C provides further information for calculating the volume of the specimen used for the determination
of the density in the case that method A (the immersion method) is applied.

General Information

Code	Classification	Theme	Pages	Publisher	Availability
RS ISO 1183-1: 2025	ADOPTED ISO STANDARDS	Rubber and plastic industries	29	Forth Edition Dec 2025	Available