| Artist | Heinz Mack |
| Object | painting |
| Technique | acrylic paint on primed cotton |
| Dimension | 61 × 69 cm |
| Title | “Sunspectrum” |
| Date | 1999 |
Before treatment (raking light): The painting was damaged by falling on its lower right corner. Diagonal cracks developed from this. The painting was stretched on a temporary adjustable stretcher. On the low pressure table the cracks were consolidated with sturgeon glue and flattened.
Before treatment.
After treatment.