| Kajehase |
Wood (and most trash, I guess) burns better too, so I suspect ash from human bodies will usually have burnt at higher temperatures, which may have some effect. (Note: I slept my way through Physics, and had an incomprehensible Norwegian for a Chemistry teacher, so I'm probably talking out of the wrong orifice here.)
| Sissyl |
Charcoal requires a relative lack of oxygen, low temperatures and long time. It's a very specific thing.
Human ashes are not something that is easy to achieve. You need high temperatures and long times. If you merely put someone on a jumble of sticks and burn them, you're at most going to end up with a burnt corpse like those found in apartment fires and the like - superficially crisped, but nothing like ash. Then, even if you do have enough heat and time, you will still end up with blackened bones. Calcium isn't good at burning.
Krensky
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Ok. That's not all that helpful. Is the fire particularly hot?
Although, in all honesty, this is the wrong direction.
Do you, as GM, want the remains to be identifiably different from other burnt meat and bones or biomass?
If you do because it's a clue, ask for a easy knowledge check or just give the players the info if they're examining it.
If you don't want them to figure it out by inspecting the leftovers, they don't.
| The NPC |
Ok. That's not all that helpful. Is the fire particularly hot?
Although, in all honesty, this is the wrong direction.
Do you, as GM, want the remains to be identifiably different from other burnt meat and bones or biomass?
If you do because it's a clue, ask for a easy knowledge check or just give the players the info if they're examining it.
If you don't want them to figure it out by inspecting the leftovers, they don't.
The fire was hot enough to reduce the flesh to ash and not leave any bones left.
Krensky
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Then you don't have anything left and the for was inconceivably hot. I'd have to look it up but calcium phosphate takes insane amounts of heat to burn or vaporize. Like stellar plasma hot if memory serves.
The cremated remains you get from a funeral home have been pulverized and aren't really ash. They're calcium phosphate and various salts and a few other minerals.
No, no one would be able to tell the residue of a human, wood, or a marble statue apart after that. No without massive amid of knowledge, a well equipped modern forensic chemistry lab and a lot of luck.
Krensky
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Because it's not ash. It's calcium phosphate and salt that's been run through a grinder. If the bones are gone from the fire, the fire was incredibly hot. Basalt and granite melt at 1260 Celsius. Bone melts at 1760 Celsius. Vaporization is higher than that.
If the bones are gone, there's nothing of consequence left to examine.