Overview
ISO 9117-1:2009 specifies a standardized method for assessing whether a single coat or multi-coat system of paint, varnish, or related coating material has reached a "through-dry" state under controlled conditions. The document defines the procedure to determine both the achievement of and the time required to reach through-dry, ensuring that coatings meet expected performance regarding durability and handling. Using this international standard supports consistent quality control, product development, and comparative testing across the paint and coatings industry.
Key Topics
- Through-Dry State: The condition when a coating is dry throughout its thickness, not just on the surface. This is crucial for determining if the material is ready for handling, subsequent processing, or use.
- Test Procedure: Specifies the apparatus (including baseplate, plunger, weights, rubber disc, and gauze) and the steps for assessing through-dry state by applying defined pressure and torsion to the coated panel.
- Measurement of Through-Dry Time: Involves repeating the test at intervals to pinpoint the earliest time at which the coating achieves the through-dry state.
- Sampling and Test Panels: Provides requirements for representative sampling, panel preparation, coating thickness, and environmental conditions for drying and testing.
- Reporting: Outlines minimum information required in the test report, such as details of test panels, test conditions, observations, and any deviations from the standard procedure.
Applications
ISO 9117-1:2009 is widely used in the following scenarios:
- Paint and Coating Manufacturers: For research, development, and quality assurance of new and existing products, ensuring coatings dry properly and consistently.
- Industrial Application and OEM Processes: Verifies that multi-coat or single-coat paint and varnish systems used in manufacturing meet drying requirements for handling, processing, or further assembly.
- Product Certification and Competitive Testing: Provides a reliable basis for claims regarding drying performance, crucial for specifications in construction, automotive, aerospace, and electronics sectors.
- Laboratory Testing: Ensures that different products and batches meet the same criteria for thorough drying, aiding in compliance and regulatory assessments.
- End-User Assurance: Helps specifiers, contractors, and buyers verify that selected coatings perform as required, minimizing risks of premature failure, handling damage, or compromised appearance.
Related Standards
To support comprehensive evaluation and testing of paints and varnishes, ISO 9117-1:2009 should be used together with the following relevant standards:
- ISO 1513 - Paints and varnishes: Preparation of test samples
- ISO 1514 - Paints and varnishes: Standard panels for testing
- ISO 15528 - Paints, varnishes, and raw materials: Sampling
- ISO 2808 - Paints and varnishes: Determination of film thickness
- ISO 48 - Rubber: Determination of hardness
- ISO 4622 - Paints and varnishes: Pressure test for stackability
- ISO 3678 - Paints and varnishes: Print-free test
By referencing ISO 9117-1 along with these standards, users can achieve thorough and reproducible testing of coating systems in accordance with international best practices.
Keywords: ISO 9117-1, paints and varnishes drying test, through-dry state, through-dry time, coating performance, quality control, international standard, drying time measurement, paint testing, coating industry standards
Open preview (PDF)Paints and varnishes — Drying tests — Part 1: Determination of through-dry state and through-dry time