The Workshop of Paolo Cremonesi

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Materials and Methods for Surface Cleaning and Removal of Film-Forming Materials. Paolo Cremonesi puts the finishing touches in the workshop ‘Materials and methods for surface cleaning and the removal of film-forming materials’’. This three-day workshop on surface cleaning and the … Continue reading

De workshop cleaning painted surfaces for UVA PI1 students Historical Interiors and Wood & Furniture.

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This gallery contains 4 photos.

De workshop cleaning painted surfaces given in January 2019 to UVA PI1 students of the department Historical Interiors and Wood & Furniture. Marjan de Visser gives the workshop cleaning painted surfaces. Because since 2007 she is trained in working with … Continue reading

Internship experience

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Internship experience by Eden Victoria Christian Eden Internship experience Painting Conservation student at Grimwade Centre for Cultural Materials, Melbourne – Australia Internship for 3 weeks in 2017 As part of my master’s degree in paintings conservation I found myself looking for a practical … Continue reading

MCP mixing surfactant: Sodium Deoxycholic acid for restauration​

MCP mixing surfactant: Sodium Deoxycholic acid

Sodium Deoxycholate acid is a surfactant (detergent) that can be used as a component for both cleaning and removal of old varnish and is part of my MCP set (The Modular Cleaning Program). I love mixing this surfactant that consist of the components Deoxycholate acid and Sodium hydroxide 10%. During the process it goes through various stages that look wonderful. You need patience for it. But you will be rewarded. It starts with adding the white powdery deoxycholic acid in demineralised water, slowly wetting the powder on the stirring plate. A creamy white substance is formed. Sodium Hydroxide 10% is added and the following hours a slimy substance is formed. But finally the acid is solved and the solution is cleared!
adding DOA in demineralized water
stir well with patience
adding NaOH
the last stage: it becomes transparent

 

  Properties of Sodium deoxycholic acid:

  • Alternative Names: Sodium deoxycholic acid; deoxycholate, sodium salt
  • Chemical Name: 3, 12-α-Dihydroxy-5β-cholan-24-oic acid, monosodium salt
  • Molecular Weight: 414.6g
  • Detergent Class: Ionic (anionic)
  • Aggregation Number: 5 (average)
  • Micelle Molecular Weight: 2000g (average)
  • Critical Micelle Concentration (CMC): 2 to 6mM (0.083 to 0.249%, w/v)
  • Cloud Point: Unknown
  • Dialyzable: Yes

Modular Cleaning Program (MCP) practical course​ by Chris Stavroudis

Modular Cleaning Program practical cours by Chris Stavroudis

After the theoretical part its time for  The Modular Cleaning Program practical cours by Chris Stavroudis. 16 restorers of all disciplines came together at the SRAL in Maastricht in 2011. They planned to learn how The MCP program works in practice. Kate Bangerter and Marjan de Visser took their homemade MCP kit and tested it on the spot with the aid of Chris.

Mixing the MCP

Besides that we all made new mixtures to make a kit for everybody. It was a hard working four days long. In which we got divided in groups and mixed the five orthogonal components. Which are: water, pH buffer, chelating agent, surfactant and gelling agent. Besides that we mixed a solvent set and a Pemulen set.
During the workshop we tested the system of the set, and discussed the results.
We all went home with our own sets and can get started.
I was exhausted but satisfied, right now I already feel very confident with this method. I helps you in speeding up cleaning tests and making the recipe you chose, in every amount you want.

Modular Cleaning Program practical cours by Chris Stavroudis
All restorers together. Chris is at the back row right behind Marjan in the blue-white stripe shirt.
Modular Cleaning Program practical cours by Chris Stavroudis
putting the mixture in bottels and label them…
 

The Modular Cleaning Program (MCP) lecture by Chris Stavroudis, September 2011 Amsterdam for restoration

The Modular Cleaning Program (MCP) lecture by Chris Stavroudis

Amsterdam, September 2011

For the Aqueous Cleaning Method by Richard Wolbers, painting restorer Stavroudis developed a computerized Modular Cleaning Program (The MCP) to make the method efficient and accessible.

On the first and second of September 2011 Chris gave lectures on how to use the computer program and the aqueous chemistry.
Next week a small group of restorers of different disciplines will start
making their own MCP cleaning test sets and take the first steps in using it.
Kate Bangerter and Marjan de Visser are participating.
The Modular Cleaning Program (MCP) lecture by Chris Stavroudis
Chris Stavroudis explains the MCP, September 2, 2011
To be continued…

Experimenting with Mist-lining for lining damage

Experimenting with Mist-lining

Experimenting with Mist-lining

Maggie and Marjan were experimenting with mist-lining. They tested an alternative for lining damaged canvases which is called “Mist-lining”. This picture shows our low-pressure vacuum set-up. We tested different types of damaged and prepared textiles (colored strips in the photo) on a variety of lining canvases. Mist-lining is a great option–it was a very interesting and successful experiment!

SRAL Filling & Retouching Maastricht

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SRAL Filling & Retouching, 23rd May 2011 Maastricht Maggie and Marjan spend a perfect day at SRAL Filling & Retouching Maastricht symposium organised by Stichting Restauratie Atelier Limburg (SRAL). Kate Seymour gave a splendid lecture on fillings. The SRAL developed a very flexible and … Continue reading

Conservation Treatment Methodology Restorers Enlightenment

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Conservation Treatment Methodology Restorers Enlightenment Conservation Treatment Methodology Restorers Enlightenment. In 2007 Object conservator Barbara Appelbaum wrote her second book ‘Conservation Treatment Methodology’.  Restauratoren Nederland invited her to give a masterclass on this subject, titled: Conservation Treatment Methodology Restorers Enlightenment. During the first day … Continue reading