What preceded cleaning the ceiling painting:
The start of the restoration project
The owner who bought a beautiful mansion from 1860 in The Hague, felt directly responsible for preserving this ceiling piece in the garden room. The work had had a rough life. A missing stretcher frame cut clamping strips, many tears and wax and resin covering that are no longer sufficient, pollution, and discolored overpainting are the starts of a great project.
Colleagues from here and abroad, interns, and the owner have put their shoulders to the wheel together.
The desire to match the badly damaged painting with a modern sitting room and upholstery that looks perfect. How are we going to tackle this?… step by step and with full confidence that we will succeed.
Cleaning ceiling painting
We have applied the Modular Cleaning Program (The MCP) to clean the ceiling painting. Because the painting was definitely dirty!
Testing the cleaning
The painting was covered with a layer of varnish. And we tested free polar solvents and ketones tested for varnish removal. Subsequently, Pemulen gels and microgels were tested for the cleaning and Ethomeen-Carbopol tests for the removal of the varnish. All tests have shown that a mixture of Naphthasol D40 and benzyl alcohol in a gel of Carbopol with Ethomeen C12 gives the best result. Some different ratios have been tested. 70-30, and 50-50 work well. These mixtures can be used alternately. The mixture is applied with a white synthetic brush and gently rubbed over the surface. After the varnish and dirt have dissolved in the gel, it is wiped of using a tissue. The subsequent cleaning was carried out with Naphthasol D40. Both the cleaning and the post-cleaning were repeated several times.
After removing all this brown dirt and yellow varnish and overpaint, the ‘stripped state’ has been reached. This is what is left of the original materials such as the paint layer. From the ‘stripped state’ you can build up again. Normally an overview photo is taken of this phase, but since this painting could not be photographed properly, only an overview of the space was made.