Overview
EN ISO 8106:2004 is an international standard developed by CEN in collaboration with ISO/TC 63, focusing on the determination of glass container capacity by a gravimetric method. This test method provides a precise procedure for measuring the volume of glass bottles, jars, and pots by weighing the water they contain. The standard ensures that glass containers comply with capacity specifications essential for packaging integrity and quality control.
This gravimetric test method is critical in the packaging industry where accurate volume measurements of glass containers are necessary to meet regulatory and commercial requirements. The standard applies to a range of glass container sizes and uses a density correction factor to account for water temperature variations, ensuring reliability and reproducibility.
Key Topics
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Gravimetric Capacity Determination
Measures the capacity of glass containers by weighing water filled to brimful or a specified fill level, then calculates volume using water density correction factors.
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Sampling Requirements
Specifies representative container sampling procedures to ensure the test results accurately reflect the overall batch.
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Apparatus Needed
- Calibrated thermometer (±1 °C accuracy)
- Precision balance with accuracy depending on container volume (e.g., ±0.1g for small containers up to 10 ml)
- Strike plate for brimful capacity testing on wide-mouth containers
- Depth gauge for specified filling level capacity measurement
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Testing Procedure
Details temperature control (reference test temperature is 20 °C), container weighing before and after filling, filling methods to avoid air bubbles, and volumetric corrections based on measured water temperature.
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Capacity Calculation
Formula:
Actual Capacity (ml) = Mass of Water (g) × Volume Correction Factor (ml/g)
Volume correction factors vary slightly with temperature and are tabulated in the standard for 16–28 °C.
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Test Reporting
Requirements include complete test documentation covering container descriptions, sample size, test results, compliance with specifications, date, location, and responsible signature.
Applications
EN ISO 8106:2004 is essential for glass manufacturers, packaging engineers, quality assurance laboratories, and regulatory bodies involved with:
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Quality Control of Glass Containers
Ensures that bottles, jars, and pots meet specified capacity tolerances, critical for consistent product filling and consumer satisfaction.
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Compliance with Packaging Regulations
Supports conformity with international directives, such as the Council Directive 75/107/EEC on the approximation of laws related to measuring bottles.
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R&D and Production Monitoring
Enables evaluation of new glass container designs for volume accuracy and consistency throughout production batches.
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Supply Chain Assurance
Facilitates verification of container capacity to prevent packaging-related damage or wastage due to inaccurate volumes.
Related Standards
EN ISO 8106:2004 is part of a broader series of test methods for glass containers, including:
- EN ISO 7458 – Internal pressure resistance of glass containers
- EN ISO 7459 – Thermal shock resistance and endurance
- EN ISO 8113 – Resistance to vertical load
- EN 29008 – Verticality of glass bottles
- EN 29009 – Height and finish non-parallelism testing
- EN 29885 – Deviation from flatness of sealing surfaces on wide-mouth glass containers
These standards collectively help ensure the mechanical and volumetric quality of glass containers in packaging industries.
By implementing EN ISO 8106:2004, organizations can guarantee consistent, accurate capacity measurement of glass containers, supporting quality assurance and compliance with international packaging standards. The gravimetric method remains a reliable, widely recognized technique for volume determination in glass packaging applications.