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NO! :banghead: Only Celluloid causes 'Cell Rot'. Why do you think it's called 'Cell Rot' :thinking: It's short for Celluloid Gassing and causing the scales to emit a corrosive gas that eats the blade...

So you did the 'Pin Test' on the bone, am I to understand that you didn't use the same test on what you thought might be horn?

If you did, then you would have smelled something very similar to...

To establish a base for your questions:

1 What do you do (test) to understand about determining Bone?
2 What do you do (test) to understand about determining Horn?

Knowing would be helpful.