After 30 minutes, I made the mistake of taking the eggs after they had been submerged in simmering vinegar and washing them under cold water. This change in temperature shocked the eggs and caused some of the shells to crack, damaging the membrane underneath.
Nevertheless, I love the material qualities of the egg shells at this point. Their terracotta colour is paired back, emerging as an uber-matte, pebble like pastel.
30 min mark / Taggie Kelham by blogadmin is licensed under a Creative Commons Attribution CC BY 3.0