A 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 in the committee. Government and non-governmental international organizations that liaize with standardization organizations are also involved in this work. ISO works closely with the International Electrotechnical Commission (IEC) on all matters of electrical standardization.

International standards are drafted according to the rules given in Part 3 of the ISO/IEC Directive.

Draft international standards adopted by the Technical Committee will be circulated to member bodies for voting. Publication as an international standard requires approval by at least 75% of member institutions.

The international standard ISO 2884-1 was developed by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 9, General test methods for paints and varnishes.

ISO 2884-1-1999 “Determination of viscosity for paints and varnishes with rotary viscimeters – Part 1: Cone viscimeters operating at high shear rates”

Together with other parts (see below), this part of ISO 2884 eliminates and replaces the technically revised ISO 2884:1974. The main changes are:

a) Only cone viscometers are now specified;

b) The shear rate is within a narrow range.

ISO 2884 consists of the following parts, under the general heading Paints and Varniases-Determination of viscosity using a rotary viscometer:

— Part 1: Cone viscometers operating at high shear rates

— Part 2: Disk or spherical viscometers operating at a single specified speed

— Part 3: Disk and spindle viscometers operating at different speeds

— Part 4: Paddle viscometers operating at a single specified speed

Appendix A of this part of ISO 2884 is for information only.

ISO 2884-1-1999 “Determination of viscosity for paints and varnishes with rotary viscimeters – Part 1: Cone viscimeters operating at high shear rates”

1 Scope
This part of ISO 2884 is one of the series dealing with the sampling and testing of paints, varnishes and related products.

It complements ISO 2431:1993, Paints and varnishes – Determination of flow times using flow cups.

It specifies the general procedure to be followed in the determination of the dynamic viscosity of paints, varnish and related products at shear rates between 9 000 s−1 and 12 000 s−1.

The obtained values provide information about the resistance of the material to brush, spray, and roll coating during application.

The method specified in this part of ISO 2884 applies to all paints and varniels, whether they behave Newtonian or not. Materials containing large granular dispersions can produce spurious results.

2 Normative references

The following normative documents contain provisions which, by reference in this article, constitute the provisions of this part of ISO 2884. For dated references, no subsequent revisions or revisions to these publications apply. However, parties to agreements based on this part of ISO 2884 are encouraged to investigate the possibility of applying a new version of the following normative document. Members of ISO and IEC maintain registers of international standards currently in force.

ISO 1513-1992, Paints and varnishes. Inspection and preparation of test samples.

ISO 15528: — 1), paints and varnishes — Sampling.

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