Challenges Monte Bolca Fish: Table

TABLE 1. Results of resin trials.

Resin and layer thickness	Excessive heat produced during curing	Colour when cured	Appearance following acid treatments
Epo-tek301, 5 mm	No	Colourless	Became soft and yellowed slightly, edges flaked away
Epo-tek301, 10 mm	No	Colourless	Became soft and yellowed slightly, edges flaked away
Tiranti Clear Casting, 5 mm	No	Colourless	Colourless, white bloom on surface.
Tiranti Clear Casting, 10 mm	Yes	Colourless	Colourless, white bloom on surface.
Tiranti Clear Casting + UV stabiliser, 5 mm	Yes	Colourless	Colourless, white bloom on surface.
Tiranti Clear Casting + UV stabiliser, 10 mm	Yes	Colourless	Colourless, white bloom on surface.
Isopthalic Resin PA plus 1% catalyst, 5 mm	Yes	Amber	Amber, severe white bloom on surface.
Isopthalic Resin PA plus 1% catalyst, 5 mm	Yes	Amber	Amber, severe white bloom on edges.
Isopthalic Resin PA plus 2% catalyst, 10 mm	Yes	Dark Amber	Amber, slight white bloom on surface.
Isopthalic Resin PA plus 2% catalyst, 10 mm	Yes	Dark Amber	Amber, severe white bloom on surface.
Araldite 2020, 5 mm	No	Colourless	Moderate yellowing and severe decomposition of form due to extreme softening. Remained flexible after treatment.
Araldite 2020, 10 mm	No	Colourless	Moderate yellowing and severe decomposition of form due to extreme softening. Edges and flaked pieces are flexible.
Water White Clear Casting, 5 mm	No	Colourless	Clear, colourless.
Water White Clear Casting, 10 mm	No	Colourless	Colourless, slightly frosted in places.