These gorgeous colors with enamel drawn by quill or a fine brush to the metal in a furnace firing repeatedly, until the formation of the desired color and delicate.
这些具绚烂色彩的珐琅通过鹅毛笔或极细的画笔绘制在金属上，在炉中反复焙烧，直到形成所需的细腻色泽。
2
Both the structure and principles of design of an electrical furnace for melting enamel frit have been recommended.