tattoo with cremation ashes
https://l8wkglx469.doodlekit.com/blog/entry/5084876/20-fun-facts-about-tattoo-ink-with-ashes
When a cadaver is immolated, the residual bone matter will not be fine dust but even more like small grains or even a sand-like resemblance. Bubblegum Ink use modern day apparatus from the US to reduce and replicate