Japanese company Ko-sin Printing has developed a printing process that allows you to incorporate your DNA into the ink used to print a book.

Once DNA is extracted from a human (or animal) hair or nail sample provided by the author, it is blended with a special ink and used in the printing process. Ko-sin has already put the technology to use in some self-published autobiographies whose title pages are printed with ink that includes the author’s DNA. Mixing DNA in with the ink does not alter the appearance of the page, the company says.

Ko-sin also claims it is possible to extract genetic information from materials printed using this process. When the company sent a sample page to a DNA laboratory, the lab technicians were able to isolate and extract the DNA from the page.