ISO 1519:2011 PDF

Paints and varnishes — Bend test (cylindrical mandrel)

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Title (English):

ISO 1519:2011

Paints and varnishes — Bend test (cylindrical mandrel)

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 9
Publication date:: January 6, 2011
Edition:: ISO IS 1519 edition 3 version 1
ICS:: 87.040

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Description (English):

ISO 1519:2011 specifies an empirical test procedure for assessing the resistance of a coating of paint, varnish or related product to cracking and/or detachment from a metal or plastics substrate when subjected to bending round a cylindrical mandrel under standard conditions. For a multi-coat system, each coat can be tested separately or the complete system can be tested. The method specified can be carried out either as a “pass/fail” test, by carrying out the test with a single specified size of mandrel, to assess compliance with a particular requirement; or by repeating the procedure using successively smaller mandrels to determine the diameter of the first mandrel over which the coating cracks and/or becomes detached from the substrate. Two types of apparatus are specified, type 1 being appropriate for use on test panels of thickness up to 0,3 mm, and type 2 for use on test panels of thickness up to 1,0 mm. Both types of apparatus have been found to give similar results with the same coating, but normally only one will be used for testing a given product.

Technical details

Technical committee: ISO/TC 35/SC 9 - General test methods for paints and varnishes
SKU: ISO 1519:2011

Abstract

Overview

ISO 1519:2011 - Paints and varnishes - Bend test (cylindrical mandrel) specifies an empirical laboratory method to assess a coating’s resistance to cracking and/or detachment when a coated metal or plastic panel is bent around a cylindrical mandrel. The standard supports both a pass/fail approach (single mandrel size) and a grading approach (successively smaller mandrels to determine the smallest mandrel diameter that causes failure).

Key topics and technical requirements

Scope: Applies to single- or multi-coat systems on metal or agreed plastics substrates. Each coat or the full system can be tested.
Apparatus types:
- Type 1: for test panels up to 0.3 mm thick.
- Type 2: for panels up to 1.0 mm thick (plastics may use greater thickness by agreement).
Mandrel diameters: Standard set includes 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25 and 32 mm (±0.1 mm).
Procedure essentials:
- Bend the coated panel 180° over the mandrel in 1–2 seconds with the coated side outwards.
- Tests at (23 ± 2) °C (relative humidity measured and recorded); for other temperatures use a controlled-temperature chamber with 2 h equilibration.
- Panels conditioned at (23 ± 2) °C and (50 ± 5)% RH for a minimum of 16 hours; test within 30 minutes after removal from conditioning.
Examination and results: Inspect for cracking/detachment under good illumination; a ×10 magnifying lens may be used (must be reported). Report either pass/fail for the specified mandrel or the diameter of the first mandrel that causes failure.
Referenced methods: Sample preparation, panel type and film-thickness measurement are referenced to ISO 1513, ISO 1514 and ISO 2808.

Practical applications and users

ISO 1519:2011 is widely used for:

Quality control in paint and varnish manufacturing to verify flexibility and adhesion under deformation.
Product development to compare formulations and evaluate multi-coat systems.
Supplier and OEM specifications where coatings must resist bending or forming operations (e.g., metal fabrication, automotive panels, appliances).
Contract testing laboratories and regulatory compliance checks.

Typical users include coatings manufacturers, testing labs, quality engineers, product specifiers, and surface-finish consultants.

Related standards

ISO 1520 (Cupping test)
ISO 6272-1 and ISO 6272-2 (Rapid-deformation impact tests)
ISO 6860 (Bend test - conical mandrel)
ISO 17132 (T-bend test)

Keywords: ISO 1519:2011, bend test, cylindrical mandrel, paints and varnishes, coating cracking, adhesion, mandrel diameter, pass/fail test, coating flexibility.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope: Applies to single- or multi-coat systems on metal or agreed plastics substrates. Each coat or the full system can be tested.
Apparatus types:
- Type 1: for test panels up to 0.3 mm thick.
- Type 2: for panels up to 1.0 mm thick (plastics may use greater thickness by agreement).
Mandrel diameters: Standard set includes 2, 3, 4, 5, 6, 8, 10, 12, 16, 20, 25 and 32 mm (±0.1 mm).
Procedure essentials:
- Bend the coated panel 180° over the mandrel in 1–2 seconds with the coated side outwards.
- Tests at (23 ± 2) °C (relative humidity measured and recorded); for other temperatures use a controlled-temperature chamber with 2 h equilibration.
- Panels conditioned at (23 ± 2) °C and (50 ± 5)% RH for a minimum of 16 hours; test within 30 minutes after removal from conditioning.
Examination and results: Inspect for cracking/detachment under good illumination; a ×10 magnifying lens may be used (must be reported). Report either pass/fail for the specified mandrel or the diameter of the first mandrel that causes failure.
Referenced methods: Sample preparation, panel type and film-thickness measurement are referenced to ISO 1513, ISO 1514 and ISO 2808.

Practical applications and users

ISO 1519:2011 is widely used for:

Quality control in paint and varnish manufacturing to verify flexibility and adhesion under deformation.
Product development to compare formulations and evaluate multi-coat systems.
Supplier and OEM specifications where coatings must resist bending or forming operations (e.g., metal fabrication, automotive panels, appliances).
Contract testing laboratories and regulatory compliance checks.

Typical users include coatings manufacturers, testing labs, quality engineers, product specifiers, and surface-finish consultants.

Related standards

ISO 1520 (Cupping test)
ISO 6272-1 and ISO 6272-2 (Rapid-deformation impact tests)
ISO 6860 (Bend test - conical mandrel)
ISO 17132 (T-bend test)

Keywords: ISO 1519:2011, bend test, cylindrical mandrel, paints and varnishes, coating cracking, adhesion, mandrel diameter, pass/fail test, coating flexibility.

ISO 1519:2011 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications and users

Related standards

Related standards

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Paints and varnishes. Cupping test.

Paints and varnishes - Rapid-deformation (impact resistance) tests - Part 1: Falling-weight test, large-area…

Paints and varnishes - Rapid-deformation (impact resistance) tests - Part 2: Falling-weight test, small-area…

Paints and varnishes. Bend test (conical mandrel)

Paints and varnishes - T-bend test (ISO 17132:2007)