ASTM C813 – Standard Test Method for Hydrophobic Contamination on Glass by Contact Angle Measurement
Description:
Significance and Use
5.1 The contact angle test is nondestructive and may be used for control and evaluation of processes for the removal of hydrophobic contaminants. The test may also be used for the detection and control of hydrophobic contaminants in processing ambients. For this application, a surface free of hydrophobic films is exposed to the ambient conditions and is subsequently tested.
Scope
1.1 This test method covers the detection of hydrophobic contamination on glass surfaces by means of contact angle measurements. When properly conducted, this test method will enable detection of fractions of monomolecular layers of hydrophobic organic contaminants. Very rough or porous surfaces may significantly decrease the sensitivity of this test method.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
ASTM C807