Many years ago, whilst living in Auckland, NZ, I collected many shells from local beaches and during an evening class in print-making I experimented with a technique using a few shells and metal plates coated in photopolymer and exposed to sunlight. I love the resulting images which are highly detailed.
 
Printed using Hawthorn oil based inks and press onto 200 gsm Amatruda artisanal paper, hand made in Italy.