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Preparation layer composition of a set of varnished wood samples (1 to 6) prepared by Gabriele Carletti which, at the time of analysis, had been naturally aged for a period of four years.
| Model System | Preparation Layer Type | Preparation Layer Composition | Varnish Layer Type |
|---|---|---|---|
| 1 | water soluble | K2Cr2O7 | oil based |
| 2 | K2Cr2O7 + NaHCO3 | spirit-based | |
| 3 | cherry gum | ||
| 4 | gamboge + saffron | ||
| 5 | ethyl alcohol soluble | dragon’s blood | oil based |
| 6 | sandalwood | spirit-based |
