> I hear now that red ochre
> inscriptions can indeed be radiocarbon tested. I did some
> research on the subject, but could not find any occasions that
> this has indeed been implemented.
> Can any of you widen my horizon by giving me at least one
Thanos said that the ochre 'could have been made using eggs, honey or gum extract as a binder.'
If red ochre contains organic material, then the implication is that it could be RCD tested.
But I don't know if anyone has ever done this.