Example 53
The oil stains on the surfaces were removed by washing the first glass member and second glass member with trichloroethylene for 20 min, and then the first glass member and second glass member were irradiated with ultraviolet light for 12 h to obtain glass members with clean and activated surfaces.
Detection Means after Activation
The first glass members and second glass members obtained in all the above activation examples were determined for the contact angle with water drops. Specifically, water was dropped on the activated surface of clean first glass member and second glass member. If the water droplets can expand and wet the surface and the water droplets are visually observed to be round and evenly infiltrate the surface, or the contact angle of water with the glass is determined by a contact angle tester to be less than or equal to 10°, then the glass surface is considered clean and activated. The test results show that the contact angle (i.e. contact angle with water drops) of the activated surfaces of the first glass member and the second glass member obtained in all the activation examples is less than or equal to 10°. Specifically, the activated surfaces in Activation Examples 43-53 have respectively a contact angle of 4°, 2°, 3°, 3°, 3°, 4°, 2°, 3°, 2°, 3°, and 2°.
