This technique is the same as yusen-shippo except that at the end the metal (copper) vessel acting as a base is dissolved with acid so that only the enameled surface remains. In shippo, the base metal that acts as backing is known as tai, and sho means to omit, which is the origin of the word shotai-shippo.
Did you know?
In the shotai-shippo, the metal backing disappears and only the silver compartment outlines and glass sections remain. Pieces made with this technique are beautiful because of the way the silver glistens amid the transparent glass surroundings.
How to make shotai-shippo
"What Are Traditional Crafts? -A Guidebook to Seeing, Learning, and Enjoying-" Edited by the Japan Kogei Association Eastern Branch. Published by Unsodo ／ List of works English translation: Kazuko Todate (Art critic / Art historian)