Roubach et al., 2014: PREPARATION OF TURTLE FOSSIL
Figure 8: Silicon mould and preparation process of the inferior part.
Casting
applied on the replica surface to complete the
Subsequently, a cast was made with an acrylic
process (Figure 9).
resin (Acrystal prima 100pp+ Acrystal basic
250pp). The replica was painted using a
DISCUSSION
mixture of natural pigment with alcohol and
retouch varnish. In order to obtain a color
The preparation of the turtle fossil in situ was
similar to the sediment, white, black, yellow
carried out in order to give it resistance for
and blue natural pigment were mixed; for the
extraction, transport, and for manipulation
fossil bones color, a brown natural pigment was
(especially when it is turned upside down).
used. A layer of retouch varnish was also
Polyurethane protects and gives resistance to
46 Journal of Paleontological Techniques