All the stamps are silkscreen printed with very fine-grained trachyandesite ash which fell at Eyjafjallajokull in April. The trachyandesite magma has ca. 60% silica content and comes from a depth of 7 km with a temperature of more than 1100°C when it reaches the glacial ice.
The stamps were designed by Borgar Hjorleifur Arnason and Hany Hadaya.
Photographs were taken by Oskar Ragnarsson and Ragnar Th. Sigurdsson.