Ancient Chinese Sky-Blue Celadon Vase with Handles and Underglaze Carved Decoration

This research presents a comprehensive diagnostic study of an imperial celadon-glazed porcelain vase attributed to the Qianlong period (1736–1795) of the Qing dynasty. The object is a globular vase with tall neck, twin handles, and carved underglaze dragon motifs, covered with a transparent bluish celadon glaze (<i>tianlan</i>, 天蓝).The study applies multi-level methods:<b>Macroscopic analysis</b> of form, relief carving, base, and reign mark.<b>Instrumental colorimetry</b> (RGB, HSV, CIELab) to identify the glaze within the <i>sky-blue celadon</i> category.<b>Microscopic examination</b> confirming crystalline inclusions, phase-separated Pb–Si–K domains, and structural coloration effects.<b>Comparative study</b> with documented imperial pieces in the Palace Museum (Beijing), National Palace Museum (Taipei), and major auction catalogues.