Overview
SIST EN ISO 787-3:2001 - General Methods of Test for Pigments and Extenders – Part 3: Determination of Matter Soluble in Water – Hot Extraction Method is a key European and International Standard developed and published by CEN (European Committee for Standardization) and ISO. This standard outlines a precise laboratory method to determine the percentage by mass of water-soluble matter in pigments and extenders. The focus on hot extraction ensures consistency and reliability in analyzing materials used widely in paints, coatings, plastics, and construction products.
The procedure described in SIST EN ISO 787-3:2001 is critical for product development, quality control, and regulatory compliance in industries relying on pigments and extenders. It ensures that manufacturers and laboratories can reliably compare results, improving overall product safety and performance.
Key Topics
- Scope: Specifies a general laboratory method for determining the percentage by mass of substances soluble in boiling water from pigment or extender samples.
- Hot Extraction Method: Describes boiling a weighed sample with water, filtering, and measuring the residue left after evaporation and drying to constant mass.
- Applicability: Designed for use with any pigment or extender unless otherwise specified.
- Repeatability: Results are to be expressed to one decimal place and the procedure includes performing duplicate analyses for accuracy.
- Reporting: Requires detailed documentation, including water and filter types, any use of wetting agents, test portion mass, and any deviations from the standard procedure.
- Comparison: EN ISO 787-3 is distinct from EN ISO 787-8, which uses a cold extraction method and can yield different results.
Applications
SIST EN ISO 787-3:2001 is widely applied in industries where pigments and extenders are central materials, including:
- Paints and Coatings Manufacturing: Determining water-soluble content is crucial for formulating stable, high-performance products and meeting regulatory standards.
- Quality Assurance: Assists manufacturers in certifying that pigment and extender raw materials meet specific soluble matter tolerances, impacting color fastness, longevity, and compatibility.
- Research and Development: Laboratories use this method during product design for consistent pigment performance and compliance checks.
- Construction Materials: Ensures additives in mortars, sealants, and plastics do not adversely affect mechanical properties or durability due to excessive water-soluble content.
- Regulatory Compliance: Contributes to safety and environmental reporting as part of wider product testing protocols.
By providing a harmonized method for measuring water-soluble matter, this standard helps companies in the pigment and extender industries meet international trade, specification, and safety requirements.
Related Standards
SIST EN ISO 787-3:2001 is one part of a larger family of international standards focused on the testing of pigments and extenders. Important related standards include:
- EN ISO 787-8:2000: General methods of test for pigments and extenders - Part 8: Determination of matter soluble in water - Cold extraction method.
- EN ISO 787-4: Determination of acidity or alkalinity of the aqueous extract.
- EN ISO 787-1/2/5/9, etc.: Cover topics such as color comparison, volatile matter, oil absorption value, and pH value determination.
- EN ISO 15528: Paints, varnishes, and raw materials for paints and varnishes – Sampling.
- EN ISO 1042: Laboratory glassware - One-mark volumetric flasks.
Following these harmonized international standards ensures reliability, comparability, and compliance in pigment and extender analysis across global supply chains.
Keywords: SIST EN ISO 787-3:2001, pigments, extenders, hot extraction method, water-soluble matter, testing standards, paints, coatings, quality control, laboratory analysis, CEN.