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ClearShield
is a polymeric resin that will make the
surface of the glass more hydrophobic.
Typically, the contact angle on the
surface of ClearShield Glass can be
measured at 104°.
Typically,
this measurement is used as a broad
indicator of the effectiveness of the
initial application for product
development and quality control purposes.
Another test typically used for that
purpose is also the abrasion test.
However,
those measurements are not reliable
indicators for long-term durability and
fitness for purpose of glass surface
protection. Measures vary greatly
depending on parameters and abrasion
material used, and are not always
repeatable.
The Corning
Museum of Glass, New York State, USA, comments
that 'many factors influence the rate of
corrosion and no laboratory test to date
is capable of predicting service
behaviour under all conditions'.
Click here to
visit the Corning Museum of Glass
website
Therefore we should measure what is
important, and not make important what
is measurable.
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