ISO 3233-2:2019 PDF

Paints and varnishes — Determination of the percentage volume of non-volatile matter — Part 2: Method using the determination of non-volatile-matter content in accordance with ISO 3251 and determination of dry film density on coated test panels by the Archimedes' principle

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Title (English):

ISO 3233-2:2019

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 10
Publication date:: August 5, 2019
Edition:: ISO IS 3233 edition 2 version 1
ICS:: 87.040

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Description (English):

This document specifies a method for determining the non-volatile matter by volume (NVV) of coating materials by determining the practical dry-film density. This method determines the volume percentage of non-volatile matter in paints, varnishes and related products by measuring the density of a dry coating for any specified temperature range and period of drying or curing. The non-volatile matter content is determined in accordance with ISO 3251. Using the non-volatile matter by volume results obtained in accordance with this document, it is possible to calculate the practical spreading rate of coating materials. This method specifies an additional shape of plate to those described in ISO 3233‑1 and is suitable for all products which can be applied by dipping. This document is not applicable to coating materials which exceed the Critical Pigment Volume Concentration (CPVC). Annex A gives an overview of the existing methods for the determination of non-volatile matter content and of non-volatile matter volume.

Technical details

Technical committee: ISO/TC 35/SC 9 - General test methods for paints and varnishes
SKU: ISO 3233-2:2019

Abstract

Overview

ISO 3233-2:2019 specifies a laboratory method to determine the percentage volume of non-volatile matter (NVV) in paints, varnishes and related coating materials by measuring the practical dry‑film density of a coated test panel using Archimedes’ principle. The standard combines a mass‑loss (non‑volatile matter) determination in accordance with ISO 3251 and a practical dry‑film density measurement on dipped plates. Results support calculation of the practical spreading rate of coating materials. This part applies to products that can be applied by dipping and is not suitable for coatings that exceed the Critical Pigment Volume Concentration (CPVC).

Key topics and requirements

Principle: Determine NVV from the ratio of coating density to dry‑film density; dry‑film density is obtained by buoyancy (weighing in air and in an immersion liquid).
Referenced test methods:
- Non‑volatile matter by mass - ISO 3251
- Density measurements - ISO 2811 (for immersion liquid and coating density)
- Dry film thickness - ISO 2808
- Sample preparation and sampling - ISO 1513 and ISO 15528
Apparatus and test plate:
- Metal plate ~40 × 85 mm, ~0.7 mm thick, with a small hole near the upper edge (additional shape to ISO 3233‑1).
- Analytical balance (0.1 mg accuracy), immersion beaker, hook/wire (≤0.30 mm), immersion liquid (water usually suitable).
Procedure essentials:
- Coat plates by immersion, dry/cure at specified temperature and time, cool in a desiccator.
- Weigh uncoated and coated plates in air and while immersed to calculate dry‑film density.
- Minimum mass of coating on the plate: 25 mg (to ensure measurement accuracy).
- Controlled oven temperatures with specified tolerances for drying.
Limitations: Not applicable to systems above CPVC; thixotropic materials may be diluted per manufacturer instructions to ensure uniform coating.

Applications and users

ISO 3233-2:2019 is used by:

Paint and coating manufacturers for product specification, QC and R&D (formulation, density and coverage verification).
Independent testing laboratories and conformity assessment bodies for standardized NVV and spreading rate reporting.
Specifiers and procurement teams to compare practical spreading rates and coverage estimates.
Regulatory and certification organizations requiring traceable, repeatable NVV and film density data.

Practical benefits include improved accuracy of coverage calculations, more realistic practical spreading rates for on‑site use, and consistent inter‑laboratory comparison.

Related standards

ISO 3251 - Determination of non‑volatile‑matter content
ISO 2811 (all parts) - Determination of density
ISO 2808 - Determination of film thickness
ISO 1513 - Sample preparation
ISO 15528 - Sampling

Keywords: ISO 3233-2:2019, non-volatile matter by volume, NVV, dry-film density, Archimedes' principle, paint testing, practical spreading rate, ISO 3251.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and requirements

Principle: Determine NVV from the ratio of coating density to dry‑film density; dry‑film density is obtained by buoyancy (weighing in air and in an immersion liquid).
Referenced test methods:
- Non‑volatile matter by mass - ISO 3251
- Density measurements - ISO 2811 (for immersion liquid and coating density)
- Dry film thickness - ISO 2808
- Sample preparation and sampling - ISO 1513 and ISO 15528
Apparatus and test plate:
- Metal plate ~40 × 85 mm, ~0.7 mm thick, with a small hole near the upper edge (additional shape to ISO 3233‑1).
- Analytical balance (0.1 mg accuracy), immersion beaker, hook/wire (≤0.30 mm), immersion liquid (water usually suitable).
Procedure essentials:
- Coat plates by immersion, dry/cure at specified temperature and time, cool in a desiccator.
- Weigh uncoated and coated plates in air and while immersed to calculate dry‑film density.
- Minimum mass of coating on the plate: 25 mg (to ensure measurement accuracy).
- Controlled oven temperatures with specified tolerances for drying.
Limitations: Not applicable to systems above CPVC; thixotropic materials may be diluted per manufacturer instructions to ensure uniform coating.

Applications and users

ISO 3233-2:2019 is used by:

Paint and coating manufacturers for product specification, QC and R&D (formulation, density and coverage verification).
Independent testing laboratories and conformity assessment bodies for standardized NVV and spreading rate reporting.
Specifiers and procurement teams to compare practical spreading rates and coverage estimates.
Regulatory and certification organizations requiring traceable, repeatable NVV and film density data.

Practical benefits include improved accuracy of coverage calculations, more realistic practical spreading rates for on‑site use, and consistent inter‑laboratory comparison.

Related standards

ISO 3251 - Determination of non‑volatile‑matter content
ISO 2811 (all parts) - Determination of density
ISO 2808 - Determination of film thickness
ISO 1513 - Sample preparation
ISO 15528 - Sampling

Keywords: ISO 3233-2:2019, non-volatile matter by volume, NVV, dry-film density, Archimedes' principle, paint testing, practical spreading rate, ISO 3251.

ISO 3233-2:2019 PDF

Technical details

Abstract

Overview

Key topics and requirements

Applications and users

Related standards

Related standards

Abstract

Overview

Key topics and requirements

Applications and users

Related standards

Related standards

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