preface
ISO (International Organization for Standardization) is a global alliance of national standards bodies (ISO member bodies). The development of international standards is usually carried out through ISO technical committees. Each member institution interested in a subject on which a technical committee has been established has the right to be represented on that committee. International governmental and non-governmental organizations liaising with ISO are also involved in this work. ISO works closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

The procedures used to develop this document and those used for further maintenance are described in Part 1 of the ISO/IEC Directive. In particular, note the different approval standards required for different types of ISO documents. This document has been drafted in accordance with the editing rules in Part 2 of the ISO/IEC Directive (see iso.org/directives).

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The committee responsible for this document is ISO/TC 35, Paints and Varnishes, Subcommittee SC 9, Common Test Methods for Paints and Varnishes.

The third edition cancelled and replaced the second edition (ISO 2811-1:2011), which was technically revised with the following changes:

a) The accuracy information of the analytical balance (6.2) and thermometer (6.3) has been changed;

b) Add the requirement that the sample is bubble-free;

c) The spelling of the gravity bottle has been corrected.

ISO 2811 consists of the following parts under the general heading Paints and varnishes – Determination of density:

— Part 1: Gravity bottle method

— Part 2: Immersion (plunge) method

— Part 3: Oscillation method

— Part 4: Pressure cup method

1 range
This part of ISO 2811 specifies methods for determining the density of paints, varnishes and related products using metal or Gay-Lussac gravity bottles.

This method is limited to materials with low or medium viscosity at test temperatures. Hubbard gravity bottles (see ISO 3507) can be used for high viscosity materials.

ISO 2811-1-2016 “Paints and varnishes — Determination of density — Part 1: Specific gravity bottle method”

2 Normative references
All or part of the following documents are referred to normatively in this document and are required for their application. For dated references, citation-only versions apply. For undated references, the new version of the reference (including any revisions) applies.

ISO 1513, Paints and varnishes – Examination and preparation of test samples

ISO 3696, Analytical laboratory water – specifications and test methods

ISO 15528, Paints, varnishes and raw materials for paints and varnishes — Sampling

3 Terms and Definitions
For the purposes of this document, the following terms and definitions apply.

3.1 Density R

Mass divided by the volume of a part of the material

Note 1: It is expressed in grams per cubic centimeter.

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