Francesco Fragomeni is contemporary artist and photographic process historian.
www.francescofragomeni.com
Prints using the blood of his portrait subjects.
Moderator's addition:
From the linked site:
"The Blood Portrait project is from my ongoing work exploring ‘derivatives’ or ‘derivative printmaking’. The blood portraits explore the use of constitutes parts of blood, primarily hemaglobin, iron and copper salts, and natural pigments, as a medium for printed portraiture. It represents a Postdigital approach to printmaking that examines the interplay between analog, mechanical, and digital image making and the biological form as both subject and medium.