cremation ashes in tattoo ink
http://shaneimyc540.unblog.fr/2019/07/24/the-ultimate-glossary-of-terms-about-how-to-make-tattoo-ink-from-ashes/
When a body is consumed, the residual bone matter will not be fine dust but more like small grains or a sand-like substance. BubblegumInk.com utilize state of the art apparatus from the USA to reduce and copy the