About Tetsu-e
陶芸の基本用語で、焼くことによって絵の具にふくまれている鉄分の色が変わることを利用した絵のつくりかたを指します。酸化鉄（さびた鉄）を含む絵の具で模様を描き、焼くと透明になる釉薬をかけて本焼をします。
| What is Tetsu-e (iron underglaze)? |
Tetsu-e is a technique in ceramics that involves painting patterns with an iron oxide-based pigment, applying a glaze that becomes transparent when fired. By utilizing the change in color of the iron content in the pigment when fired, this technique forms the basis of ceramic art. The patterns drawn with a brush are faithfully expressed, and by adjusting the kiln temperature and the composition of the pigment, the color can be changed from the original reddish-black rust color to shades of yellow-brown to black.
| Making Process of Tetsu-e |
1. Use bisque-fired vessel
2. Paint patterns with pigment
3. Apply a glaze that becomes transparent when fired (initially white before firing)
4. Complete by firing (copper is used for the red areas)
＜Source: "What is Traditional Kōgei?" Edited by Japan Kōgei Association East Japan Branch / Published by Unsodo, P.12>
