| Sample | Colour | Optical observation | SEM-EDX | μ-Raman | FTIR |
| Inner Painting layer | White | - Course in texture, varying thicknesses and in multiple layers. - particle size between 1,033,004 - 184,746 nm - reinforced with strips of chopped straw | Ca, S, Si, Al, Fe, Ti, Sr. | Calcite Gypsum | Calcite Gypsum |
| Preparation layer | White | Characterized by surfaces with variable cavities, homogeneous surface and composed of fine grains. | Ca, S, Si, Fe, Al | Calcite Gypsum | Calcite Gypsum |
| Pigment | Blue | Light blue crystals spread within a transparent matrix and rich in detachment part. | Ca, Si, Cu, S, Al, K, Fe | Cuprorivaite |
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| Pigment | Green | - Various shades with yellow-orange particles scattered in the matrix. - The green particles are pale, rounded and translucent with some exhibiting of grainy texture | Ca, Si, Cu, Fe, Al, K | Cuprorivaite Yellow ochre |
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| Pigment | Yellow | - The surface is bright-yellow to orange-yellow and brownish-yellow - Small and rounded grains of the pigment and the hue is affected by impurities found in the layer. | Ca, S, Si, Fe, Al, K | Yellow ochre Calcite | Red ochre Calcite Gypsum |
| Pigment | Red | Reddish color tends to yellow and fall of voids | Ca, S, Si, Fe, Al, K | Red ochre Calcite | Red ochre Quartz |
| Pigment | Brown | Deep brown to reddish with black particles in the layer. | Ca, S, Si, Fe, Al, C | Red ochre carbon | Red ochre Calcite |
| Pigment | Dark red | Deep brown to reddish with black particles in the layer. | Ca, S, Si, Fe, Al, C | Red ochre carbon | Red ochre Calcite |
| Pigment | White | Slightly thick with different chromatic hues range from red to yellow, rich in voids and covered with dust. | Ca, S, Si, Fe, Ti, Sr, K | Calcite Gypsum | Calcite Gypsum |