- all volatile (blood, fat, etc,..) (REACTIVE)
- all volatile ( reactive substances, liquids) are squeezed out leaving a thin film of carbon. Commonly preserves plants, fish, rarely others (salamanders, Jellyfish)
-all fluids (water based, also fats, blood) are squeezed out leaving a thin film of carbon. Commonly preserves leaves, fish, rarely frogs, salamanders, jellyfish.