ISO 12491-1997 PDF

Full title and description

St ISO 12491-1997 — Paints and varnishes — Determination of the resistance to solvents of cured film by an adhesive-dolly method (This entry refers to ISO 12491:1997, the international standard specifying a test method for assessing the solvent resistance of cured paint and varnish films using an adhesive dolly pull-off technique.)

Abstract

ISO 12491:1997 specifies a laboratory test method to determine the resistance of cured paint and varnish films to solvents by using an adhesive dolly (also called an adhesive wheel or pull-off dolly) to remove the film after exposure to a defined solvent. The method evaluates the degree to which the solvent softens or dissolves the film, as indicated by the amount of film removed when the adhesive dolly is pulled off. The standard provides details on test specimen preparation, solvents, exposure procedures, adhesion of the dolly, removal technique, and rating of results.

General information

• Status: Published (1997)
• Publication date: 1997
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 87.040 — Paints and varnishes; Coatings
• Edition / version: ISO 12491:1997 (first edition)
• Number of pages: Typically short (around 6–8 pages)

Scope

This standard applies to the laboratory assessment of the resistance to solvents of cured organic coatings (paints and varnishes) on rigid, non-porous substrates. It is intended for coatings that have cured to a continuous film and where solvent attack can be judged by mechanical removal with an adhesive dolly after solvent exposure. The method is not intended for assessing film resistance to mechanical wear or for porous substrates and may be complemented by other solvent-resistance or chemical-resistance tests when appropriate.

Key topics and requirements

• Preparation of test panels and conditioned, cured coating films to defined film thickness and curing conditions.
• Selection and specification of test solvents, volumes, and exposure times.
• Application and adhesion of the adhesive dolly to the film surface using a specified adhesive and pressure.
• Procedure for solvent exposure (e.g., droplet, swab, or immersion) and timing before attempting dolly removal.
• Method of dolly removal (direction, speed, and angle) and equipment for applying consistent pull-off force.
• Rating system to quantify the degree of damage or removal (e.g., complete removal, partial removal, softening, no effect).
• Reporting requirements: details of materials, substrates, film thickness, solvent used, exposure conditions, and test results.

Typical use and users

ISO 12491:1997 is used by paint and coatings manufacturers, quality-control laboratories, research and development teams, and third-party testing organizations to evaluate and compare the solvent resistance of cured coatings. It is helpful when selecting coatings for environments where solvent contact may occur (maintenance, cleaning agents, industrial exposures) and for formulation development, batch quality checks, and conformity assessment.

Related standards

Standards commonly used alongside or referenced with ISO 12491 include other ISO and national methods for coatings testing such as solvent-resistance tests, chemical-resistance tests, adhesion tests (e.g., pull-off and cross-cut methods), and standards specifying specimen preparation and conditioning. Relevant examples include related ISO tests for paints and varnishes that assess chemical resistance, adhesion, film thickness, and curing.

Keywords

ISO 12491, solvent resistance, paints, varnishes, cured film, adhesive dolly, pull-off, coatings test, chemical resistance, paint testing

FAQ

Q: What is this standard?

A: ISO 12491:1997 is an international test method that specifies how to assess the resistance of cured paint and varnish films to solvents using an adhesive dolly pull-off procedure.

Q: What does it cover?

A: It covers the preparation of test specimens, the choice of solvents and exposure procedures, application and removal of an adhesive dolly, criteria for evaluating damage or film removal, and reporting of results.

Q: Who typically uses it?

A: Paint and coatings manufacturers, QC and R&D laboratories, coating formulators, and independent test labs use this standard to evaluate solvent resistance and to compare products or ensure batch consistency.

Q: Is it current or superseded?

A: The document represented the ISO publication from 1997. Users should check with the appropriate standards body to confirm whether it remains current, has been amended, or has been withdrawn or superseded by a newer method.

Q: Is it part of a series?

A: It is one of many ISO standards in the paints and varnishes series dealing with test methods for properties such as adhesion, chemical resistance, film thickness, and hardness; it complements other related standards rather than being a numbered series by itself.

Q: What are the key keywords?

A: Solvent resistance, adhesive dolly, pull-off, paints, varnishes, cured film, coatings testing.