Ashing
The terminal stage of heat damage, above approximately 400 degrees Celsius, in which carbon oxidises to carbon dioxide and only inorganic mineral residue (calcium carbonate, silica) survives; writing is generally destroyed at this stage.
The terminal stage of heat damage, above approximately 400 degrees Celsius, in which carbon oxidises to carbon dioxide and only inorganic mineral residue (calcium carbonate, silica) survives; writing is generally destroyed at this stage.
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