Research on the practical application of lapis lazuli to the ceramic blue glaze

本研究是在工艺试验和烧成试验分析的基础上，将研磨后的青金石用于陶瓷釉料的实际应用。在项目的第一个财政年度，从粗宝石中分选和研磨的青金石粉末中提取了高纯度的蓝色颜料。在此基础上，对平成22 ~平成23号釉在烧成过程中的发色可能性进行了研究，最终完成了质地稳定、发色稳定的低温青金石釉。另一方面，研究澄清了该材料不适用于高温陶瓷釉料的事实。研制了低温还原青釉，并应用于陶瓷制品。最终成果作为项目最后一个财政年度的研究成果报告在展览会上展出。

This research was based on technical experiments and the analysis of the firing tests for practical application of grinded lapis lazuli to the ceramic glaze material. At the first fiscal year of the project, a high-purity blue pigment was extractedfrom powdered lapis lazuli which was sorted and grinded from a rough gemstone. Then, an investigation into the possibility of color development in firing process was conducted from the Heisei 22 to 23.As a result, low-temperature lapis lazuli glaze characterized by stable texture and color development was completed. On the other hand, the studies clarified the fact that the material was not applicable to high-temperature ceramic glaze. The low-temperaturelapis lazuli glaze was developed and applied to ceramic works. The final outcomes were presented at the exhibition as a research accomplishment report at the final fiscal year of the project.