Bisque porcelain, also known as biscuit porcelain, refers to unglazed, white porcelain that has been fired twice to achieve its distinctive matte finish and fine texture. It is prized for its smooth, velvety surface, which beautifully reveals the precision of hand engraving.
The process begins with the creation of a mold, which serves as the foundation for shaping the porcelain paste. Once cast, the piece undergoes two stages of firing: the first at approximately 1000°C to harden and stabilize the form, and the second at around 1400°C — a process known as bisque firing, literally meaning “twice-baked.” This double firing enhances the porcelain’s strength, translucency, and delicate luminosity — qualities essential to the art of lithophane.
