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1.1 This test method describes a procedure for evaluating dry abrasion resistance of a thin hydrophobic or omniphobic coating, or both. The coating is typically less than 100 nm thick and is applied to a planar, glass substrate by application methods including, but not limited to, physical vapor deposition (PVD), dip, or spray.

1.2 Units—The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard with the exception of angular measurement which are reported in degrees.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

5.1 The test method is to be used to determine the abrasion resistance or mechanical durability of thin omniphobic or thin hydrophobic coatings. These coatings are often used to enhance the surface’s value by promoting fingerprint resistance, water removal, stain resistance, and easy-clean properties. A comparison of the contact angle and the depreciation of that contact angle due to exposure to mechanical abrasion determines the coating’s ability to remain effective after exposure to environmental abrasion.

5.2 Different coating materials may be evaluated for relative durability by evaluating abrasion cycles versus water contact angle using this method.

5.3 Different curing or conditioning methods may be evaluated by preparing test specimens with the same coating and then evaluating abrasion resistance using this method.