Difference between ante-moem burns and post-moem burns: Trait Ante-moem burns Post-moem burns Line of redness Present Absent Blister Contains serous fluid with proteins and chloride. Base is red and inflamed. Contains air and thin clear fluid. Base is dry, hard, and yellow Vital reaction Marked cellular exudation and reactive changes in the tissue cells present Absent Enzymes Peripheral zone of burn shows increase in enzyme reaction Peripheral zone does not show increase in enzyme reaction Ref: The Essentials of Forensic Medicine and Toxicology, 27th edition, Page 289, 290.