Paints and Varnishes — Determination of Gloss Value at 20°, 60°, and 85°
Purpose:
This standard specifies a method for measuring the gloss of paint coatings, varnishes, and similar products using a gloss meter at three specified angles:
- 20° – For high-gloss surfaces.
- 60° – For medium-gloss surfaces (general-purpose measurement).
- 85° – For low-gloss or matte surfaces.
Key Applications:
- Quality Control in coating production.
- Appearance Evaluation for decorative or functional coatings.
- Performance Testing to assess consistency in gloss levels.
Procedure Overview:
- Sample Preparation – Apply the coating to a flat surface and allow it to dry.
- Gloss Measurement – Use a glossmeter calibrated for the required angle.
- Result Evaluation – Record readings and compare them with standard reference values.
Significance:
- Ensures uniform gloss evaluation across industries.
- Facilitates product comparison for compliance and quality standards.
- Supports reproducibility of results by standardizing testing methods.