Problems like coating peeling, poor ink adhesion and weak bonding are common in film, plastic, glass and coating industries. Many factories rely on visual checks or simple wipe tests to judge surface treatment results. Such methods are subjective. Different operators may get different judgments even on the same batch, making process control unstable.

The contact angle tester, also known as water drop angle tester, quantifies surface wettability. A tiny liquid droplet is placed on the sample surface. The built-in camera captures the droplet shape, and the system automatically calculates the contact angle to identify hydrophilic or hydrophobic surfaces. It can also calculate surface free energy. It is widely used to verify the effect of plasma treatment, corona treatment and substrate activation before spraying.

This desktop type saves space and fits both laboratory R&D and online sampling inspection. The operation is straightforward and requires little training. Test data can be saved and exported for reports and parameter comparison. It helps users test new material formulas, check incoming materials and track production quality. Reliable test data reduces trial-and-error cost and rejects caused by insufficient surface treatment.