ASTM D714-25 PDF

Full title and description

ASTM D714-25 — Standard Test Method for Evaluating Degree of Blistering of Paints. This method provides photographic reference standards and a procedure to describe and rate the size and density of blisters that develop in paint films, primarily on metal and other nonporous substrates (with guidance for porous substrates when appropriate).

Abstract

ASTM D714-25 specifies a visual-reference photographic system to evaluate blistering on painted surfaces. The method defines blister-size categories, density ratings and reporting conventions so that comparative assessments can be made between coatings and test conditions. An adjunct set of photographic plates (digital photos) is available to illustrate blister size and frequency for use with the test method.

General information

• Status: Active.
• Publication date: January 1, 2025.
• Publisher: ASTM International (ASTM).
• ICS / categories: 87.040 — Paints and varnishes.
• Edition / version: D714-25 (2025 edition).
• Number of pages: 6 pages.

These bibliographic and bibliometric details are taken from the ASTM product listing and standard metadata.

Scope

This test method employs photographic reference standards to evaluate the degree of blistering that may develop when paint systems are subjected to conditions that cause blistering. It is intended primarily for metal and other nonporous surfaces but may be applied to porous substrates (for blister sizes within the scope of the reference standards). Where the photographic reference standards are used as a specification of performance, permissible degrees of blistering should be agreed between purchaser and seller.

Key topics and requirements

• Use of photographic reference plates to classify blister size and density for consistent visual grading.
• Definitions of blister-size categories and density (frequency) rating scales to support repeatable reporting.
• Applicability primarily to nonporous substrates (metal), with notes on use for porous materials where appropriate.
• Guidance that allowable blistering for acceptance must be agreed between purchaser and supplier when the reference standards are specified for performance.
• Availability of an adjunct photographic set (digital images) to accompany the standard for practical evaluation.

Typical use and users

Laboratories performing coatings evaluation, quality-control personnel in paint and coatings manufacture, coating specifiers and inspectors, corrosion engineers, failure-analysis laboratories, and contractors inspecting in-service coatings commonly use ASTM D714-25 to classify and report blistering. The method is also used alongside corrosion and weathering tests to help interpret coating performance.

Related standards

ASTM D714-25 is commonly used in the same testing and specification context as other paint/coating standards such as ASTM D1654 (evaluation of painted/coated specimens subjected to corrosive environments), ASTM D610 (degree of rusting), ASTM D2247 (water resistance in 100% RH), ASTM D1014 (exterior exposure tests of paints on metal), ASTM D4214 (degree of chalking), and related appearance and degradation test methods. These related documents are listed in the paint standards collection and BOS volume for coatings.

Keywords

blistering, paint evaluation, coatings, blister size, density rating, photographic reference standards, coatings inspection, corrosion-related defects.

FAQ

Q: What is this standard?

A: ASTM D714-25 is a Standard Test Method for Evaluating Degree of Blistering of Paints that uses photographic reference standards and a visual grading procedure to report the size and density of blisters on paint films.

Q: What does it cover?

A: It covers the visual classification and reporting method for blistering (size and frequency) on painted surfaces, primarily nonporous substrates; it does not prescribe exposure methods that cause blistering (those are covered by separate practices/tests). The standard may be used in specifications where the allowable degree of blistering is defined by agreement.

Q: Who typically uses it?

A: Coatings manufacturers and their QC labs, independent test laboratories, coating inspectors and specifiers, corrosion/failure analysts, and contractors performing inspections are the primary users. It is often used alongside corrosion and outdoor-exposure test methods.

Q: Is it current or superseded?

A: As published on January 1, 2025 the D714-25 edition is the active/current edition (D714-25). Users should confirm they have the latest edition or any adjuncts when applying the method.

Q: Is it part of a series?

A: D714-25 is part of the ASTM coatings/paints suite of standards (Book of Standards Volume 06.01) and was developed by Subcommittee D01.25; it is used in combination with other ASTM paint and corrosion test methods. An adjunct photographic plate package is available to support the standard.

Q: What are the key keywords?

A: Blistering, paint, coatings, visual grading, photographic reference, blister size, blister density, inspection, corrosion.