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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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