Glass is widely used in consumer electronics (mobile phones, tablets, displays), automotive (windows, lights), architecture, and optical components. Its surface properties—particularly wettability and cleanliness—directly impact coating, lamination, printing, and protective performance. **Contact Angle Measurement** is the most intuitive and quantitative method for evaluating glass surface condition.

1. Application Scenarios

Display & Touch Cover Glass
In mobile phone, tablet, and TV panel manufacturing, contact angle measurement can determine whether the glass requires plasma/UV cleaning. Plasma treatment significantly reduces the contact angle, ensuring uniform lamination of optical fiber adhesives (OCA) or polarizers, and preventing bubbles and delamination.

Coating & Thin Films
In optical coatings, anti-glare films (AR/AG), and anti-fingerprint (AF) coating processes, contact angle measurement is used to assess the degree of glass surface activation. A small contact angle indicates high surface energy, which promotes uniform coating adhesion and long-term stability.

Glass to Metal/Plastic Adhesion
When bonding automotive glass, cover glass, and exterior frames, water drop angle measurement helps determine whether the adhesive can adequately wet the glass, improving bond strength and durability.

Hydrophobic/Oleophobic Testing
When testing water- and oil-repellent coatings on mobile phone screens or car windows, the water drop angle is used to quantify the coating's protective properties. A water drop angle >100° generally indicates good hydrophobicity/fouling resistance.

2. Significance

Quantitatively assesses glass surface cleanliness and energy levels;

Verifies plasma cleaning/activation process effectiveness;

Provides reliable quality control metrics for bonding, laminating, and coating processes;

Applied to product functional testing (e.g., water and oil repellency).

Contact angle measurement is a crucial tool for glass surface treatment and quality control, verifying plasma cleaning/activation effectiveness and evaluating protective coating performance. It is a key guarantee for high-quality glass applications in the electronics, automotive, and optical sectors.