Patent ID: 6867854

Claim:
A sample transition angle-based method of characterizing the contact angle wetting response of a test liquid on a solid material surface, said method comprising the steps of: exposing a sample of said test liquid to a test fixture having a pair of planar segments, including test surfaces of said solid material, disposed in selectable, substantially closed-vertex, angular dispositions; said substantially closed-vertex angular dispositions in said test fixture being selectable between angles of zero degrees and one hundred eighty degrees in angular size range; changing said test fixture selectable angular disposition, within said zero degrees and one hundred eighty degrees range, until said test liquid sample incurs a transition in test surfaces liquid-solid contact behavior; measuring a planar segments angular disposition, within said zero degrees and one hundred eighty degrees selectable range, at which said transition in test surfaces liquid-solid contact behavior occurs; and determining, from said planar segments angular measurement and a selected algorithm of planar segments angle and liquid contact angle mathematical relationships, liquid to solid contact angle wetting response characteristics of said applied test liquid sample and said solid material surface.