A mural or painted sculpture is not a single skin of color. Studies at Maijishan examine ground, preparatory layers and the painted surface. They respond differently to moisture, salts, cracks and earlier repairs. The image depends on what supports it: if the cliff becomes damp or a layer detaches, pigments can fade, lift or fall away. Understanding that sequence comes before choosing treatment.
From the journal
Color That Lives on Clay: Painting and Conservation
Painted sculpture and murals hold layered materials; water, flaking and age make preservation a careful act of diagnosis.
In the same city · Tianshui ↗A painted surface is built in layers
Repair material has to belong
The institute describes research into the materials and techniques of individual sculptures and murals. Repairers may seek suitable earth in nearby geological layers and pay attention to the water used to prepare it. A mixture must work with old material in color, strength and cave conditions. Conservation is not repainting a missing patch; it stabilizes the object while keeping its historic surface legible.
A small loss can take a morning
A report describes a restorer cleaning dust, applying a mixed solution, filling a loss with clay and adjusting the surface. One small sculpture gap took much of a morning. That pace reflects the complexity of original materials, repair history and present condition. The craft lies in knowing how little to add and how to secure a fragile edge without letting new work dominate.
Humidity changes the preservation problem
Rain and seepage can keep caves damp. Paint may flake, clay weather and a loosened support threaten the figure above it. The institute studies rainfall, drainage and seepage paths alongside conditions in individual caves. Misty mountain scenery is beautiful, while moisture is a serious conservation challenge; both are part of the same local climate.
From close looking to digital records
Conservators document damage, materials and repairs so later teams can compare change. Maijishan’s digital projects use high-resolution photography and three-dimensional recording; a small cave can require thousands of photographs. A detailed image may reveal a hairline crack or a change in colour, while a three-dimensional record follows the contour of a damaged edge. Temperature, light and moisture readings help explain what has changed. Together, these dated records give future teams a baseline for assessing cracks, surfaces and the performance of earlier repairs.