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Mold-Making |
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Most
often, we constructed silicone rubber molds. We first made a
"dam" out of clay that surrounded the entire trace fossil. We
made sure that there were no gaps or holes on the surface of
the trace fossil that the liquid silicone rubber could leak
out of.
Then we mixed the silicone rubber (it came in two parts - the
silicone rubber and the hardener). We actually used a drill
with a paint mixer attached to it to mix the rubber. |
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Sometimes
the rubber can stick to the surface of the trace fossil and
cause some damage. To avoid this, we used a "separator" that
was sprayed directly onto the surface of the trace fossil. We
then poured the liquid rubber directly onto the trace fossil.
We let the rubber harden over night. Once the rubber had hardened,
we very gently peeled it off the trace fossil. |
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