Yellow-Ground Famille Rose Vase with Turquoise Base and Blue Enamel Qianlong Mark

This article presents a comprehensive art-historical and technological analysis of a Qing dynasty porcelain vase decorated in the famille rose palette on a yellow sgraffito ground. The base is enamelled turquoise and bears a four-character reign mark Qianlong nian zhi (乾隆年製), executed in blue overglaze enamel. Such a combination of turquoise base and overglaze blue enamel mark is a well-documented indicator of imperial workshop finishing and approval during the Qianlong reign (1736–1795). Microscopic observations reveal typical eighteenth-century enamel structures: lead-rich yellow glaze with microbubbles, ruby-pink enamel containing colloidal gold, turquoise enamel with “orange-peel” surface texture, and meniscus rims around strokes of the blue enamel mark. Comparative analysis with published examples from the Palace Museum (Beijing), National Palace Museum (Taipei), the British Museum, and the Freer Gallery of Art confirms the attribution to the imperial kilns and palace workshops of the Qianlong era. Description of the Object Type: Baluster-shaped porcelain vase with wide flaring neck. Period: Qing dynasty, reign of the Qianlong Emperor (1736–1795). Origin: Jingdezhen imperial kilns, with final decoration attributed to the palace workshops (Zaobanchu) in Beijing. Ground: Yellow overglaze enamel, smooth and glossy, covering a fine sgraffito leiwen (spiral scroll) design impressed in the body. Decoration: Painted in the famille rose (粉彩) palette, showing multicolored flowers, grapes, butterflies, and seasonal plants, with soft tonal shading and black outline, characteristic of early Qianlong yangcai style. Interior and Base: Coated with turquoise enamel, semi-translucent with fine microbubbles. Mark: Four-character inscription Qianlong nian zhi (乾隆年製, “Made in the Qianlong reign”), written in blue overglaze enamel on the turquoise base, slightly sunk with meniscus rims at the edges of each stroke. Decoration and Technique Yellow Ground and Sgraffito ReliefThe entire exterior surface is coated with a lead-rich yellow enamel, applied over a finely impressed spiral scroll (leiwen) motif. The enamel flows naturally around the relief, creating meniscus edges and preserving the depth of the pattern. The surface shows microbubble inclusions under magnification, consistent with eighteenth-century lead-alkali enamels. Famille Rose PaletteThe decorative motifs include flowering branches, peonies, lotus blossoms, butterflies, and grape clusters. The use of black outline and soft shading reflects the yangcai style, developed in Beijing under imperial patronage. The pink enamel is based on colloidal gold (“purple of Cassius”), which under the microscope reveals ruby-colored particles embedded in the enamel matrix. Other colors include copper-turquoise, Naples yellow, and cobalt-based blue. Turquoise Enamel Interior and BaseThe interior of the mouth and the base are coated with turquoise enamel, exhibiting a fine “orange-peel” texture and occasional micro-pooling near the edges, typical of copper-based lead enamels of the period. The turquoise glaze provides a contrasting ground for the imperial reign mark. Blue Enamel MarkThe reign mark 乾隆年製 is executed in overglaze cobalt-blue enamel on the turquoise ground. Under magnification, the strokes reveal slight pooling, microbubbles, and raised rims (meniscus effect), characteristic of low-temperature melting of lead-alkali enamel. This technique is closely associated with palace workshop finishing, rather than mass-produced Jingdezhen wares. Iconography Butterflies (蝴蝶): symbols of joy and long life. Peony and lotus flowers: emblems of prosperity, nobility, and purity. Grapes: auspicious motif symbolizing abundance and fertility. Yellow ground: a color reserved for imperial use, directly associated with the emperor and the court. The combination of motifs suggests a message of prosperity, abundance, and longevity, consistent with imperial decorative symbolism of the Qianlong reign. Microscopic Diagnostics Yellow enamel: dense lead-alkali glass, microbubbles distributed across the surface. Pink enamel: non-uniform ruby particles, indicating colloidal gold. Turquoise enamel: micro-pores, “orange-peel” texture, pooling at edges. Blue enamel mark: meniscus rims, microbubbles, and faint halos around strokes. These traits are diagnostic of genuine eighteenth-century enamelling technology. Comparative Analysis British Museum (PDF-874, PDF-855): falangcai bowls with four-character Qianlong marks in blue enamel, associated with palace painting. Freer Gallery of Art (F1961.13): vase with turquoise base bearing four-character Qianlong mark in blue enamel. Palace Museum, Beijing; National Palace Museum, Taipei: catalogues describe multiple yangcai vases with turquoise-enamelled bases and blue enamel marks, explicitly linked to palace workshop production. Sotheby’s and Christie’s auction catalogues: frequent mention of “blue enamel reign mark on a turquoise-enameled base,” always associated with high-grade imperial wares. The vase under study corresponds closely to these documented examples, confirming its attribution as an imperial court product of the Qianlong reign. Technological Interpretation The production sequence likely involved: Forming and firing of the porcelain body. Application of the impressed spiral scroll motif. First glaze firing with transparent glaze. Application of yellow enamel ground and subsequent firing. Overglaze painting in the famille rose palette. Application of turquoise enamel on the interior and base. Final addition of the blue enamel reign mark and low-temperature firing in Beijing palace workshops. This sequence explains the observed textures, relief, and enamel layering. Conclusion The vase analyzed here presents all diagnostic features of an authentic eighteenth-century Qing imperial enamelled porcelain. The combination of a yellow sgraffito ground, high-quality famille rose painting, turquoise-enamelled base, and four-character reign mark executed in blue enamel is a hallmark of palace-supervised production. These features confirm the attribution to the Qianlong imperial kilns and Beijing palace workshops.