Join Date: Aug 2008
Location: South East of DC...Solomons
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|Electrophysics meter||WHAT THESE NUMBERS MEAN ON CORED STRUCTURE (Again ..... only with the Electrophysics|
|10 - 13||Low = Core is dry to the touch.|
|14 - 16||Slightly elevated = Faint moisture can be drawn by applying|
light pressure to the core through a paper
|17 - 23||Elevated = Slight amount of moisture is visible in|
core when squeezed by hand pressure.
|24 - 39||High = Droplets can be squeezed from core with|
light finger pressure.
|40 +||Near saturation = Moisture is clearly visible in the core|
without pressure applied.
|Note : These interpretations above are valid for|
my meter only. We don't really care about
the numbers on uncored structure. The saturation
point for polyester resin is less than 2%
and the bottoms of most polyester boats will
get there at some point in their lives, sometimes
within a few short years. Saturation in solid
glass is not always a problem but if it is,
it will be visually noticeable in the form
of certain types of blisters (No meter required)
or easily found with my little brass hammer.
In rare cases, moisture in the laminate can
be a serious issue and you can read more
about that in Osmosis Mythology.
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