ASTM C813 Test for Hydrophobic Contamination on Glass by Contact Angle Measurement

ASTM C813 detects hydrophobic contamination on glass surfaces by measuring the contact angle. Hydrophobic contaminants are organic molecules sticking on the glass surface. The test is used to detect hydrophobic contaminants on glass that harbors when exposed to ambient end use conditions. Values are expressed in SI units.

Talk to an Expert

ASTM C813 Test for Hydrophobic Contamination on Glass by Contact Angle Measurement

TRUSTED BY

Precision-driven testing for dimensional accuracy and compliance

Overview
Scope, Applications, and Benefits
Test Process
Specifications
Instrumentation
Results and Deliverables

Overview

ASTM C813 determines the presence of hydrophobic contamination on glass surfaces by measuring the contact angle of a liquid droplet. The test evaluates how surface contamination affects the wettability and cleanliness of glass.

This method is widely used in glass manufacturing, coatings, and surface treatment industries. It helps ensure proper surface preparation, coating adhesion, and optical performance.

Scope, Applications, and Benefits

Scope

ASTM C813 evaluates surface contamination on glass by analyzing contact angle behavior. The test identifies hydrophobic residues that reduce surface wettability and affect performance.

The test evaluates:

Presence of hydrophobic contamination
Surface wettability characteristics
Cleanliness of glass surfaces
Effect of contamination on coating adhesion
Surface preparation quality

Applications

Glass manufacturing and processing
Coated and treated glass surfaces
Optical and display glass
Solar panels and photovoltaic glass
Automotive and architectural glass
Quality control in surface cleaning

Benefits

Detects surface contamination effectively
Ensures proper surface cleanliness
Supports coating and bonding performance
Improves product reliability and quality
Enables comparison of surface conditions

Test Process

Sample Preparation

Glass specimens are cleaned or prepared as required.

Droplet Application

A controlled liquid droplet is placed on the surface.

Contact Angle Measurement

The angle between droplet and surface is measured.

Data Recording & Evaluation

Contact angle values are analyzed to assess contamination.

Technical Specifications

Parameter	Details
Applicable Materials	Glass surfaces
Contact Angle Range	~0° to 120°
Droplet Volume	~2 µL to 10 µL
Test Temperature	~20°C to 25°C
Measurement Accuracy	±1°
Measured Outputs	Contact angle (degrees)

Instrumentation Used for Testing

Contact angle goniometer
Precision liquid dispensing system
Optical imaging system
Surface cleaning tools
Sample stage and fixtures
Data acquisition software

Results and Deliverables

Contact angle values (degrees)
Surface wettability assessment
Contamination detection analysis
Surface cleanliness evaluation
Test condition summary
ASTM compliance report

Partnering with Infinita Lab for Optimal Results

Infinita Lab addresses the most frustrating pain points in the ASTM C813 testing process: complexity, coordination, and confidentiality. Our platform is built for secure, simplified support, allowing engineering and R&D teams to focus on what matters most: innovation. From kickoff to final report, we orchestrate every detail—fast, seamlessly, and behind the scenes.

Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote

Frequently Asked Questions

ASTM C813 evaluates hydrophobic contamination on glass surfaces using contact angle measurement. It determines cleanliness by assessing how water spreads or beads, helping identify organic residues affecting adhesion and coating performance.

Key parameters include contact angle measurement, droplet size, surface condition, and environmental factors. Controlled testing conditions ensure accurate evaluation of surface wettability and contamination levels.

The test measures contact angle of a water droplet on glass. Higher angles indicate hydrophobic contamination, while lower angles indicate clean, hydrophilic surfaces suitable for bonding or coating.

ASTM C813 is used for glass surfaces such as architectural glass, optical glass, and coated glass where surface cleanliness is critical for performance and adhesion.

ASTM C813 results may be influenced by surface roughness, environmental conditions, and measurement technique. It provides surface-level assessment and may require additional analysis for detailed contamination characterization.