munch s paintings in the aula of oslo university l.
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project outline
Project Outline
  • First Phase: monitor humidity, temperature, airborne pollutants and soiling characteristics
  • Second Phase: examination of technique and condition, documentation
  • Third Phase: removal of one of the paintings to evaluate feasibility of remounting
  • Fourth Phase: submit proposals for adjustments of building, treatment of paintings
  • Fifth Phase: implementation of accepted proposals (cleaning)
slide10

Particles within the 0.1 to 2 micron range

Investigation will focus on this range of particle size because:

  • The black tar-like particles from high temperature combustion fall into this category.
  • This range also includes sulphur dioxide and oxides of nitrogen together with ammonia.
  • This is the largest group of particulates which absorb pollutant gasses and vapours – they are therefore the highest risk group.
possible mechanisms for dirt deposition
Possible mechanisms for dirt deposition
  • Themophoresis
  • Moisture differentials
thermophoresis
Thermophoresis

Thermophoresis: Particle motion in a temperature gradient, from a hotter to a colder region

reasons for thermophoresis
Reasons for Thermophoresis
  • The fibre board backing acts as thermal insulation.
  • Air flow/ cold bridging due to joints in back board cause temperature differential across the surface of the painting.
  • Differential surface temperature results in differential dirt deposition
moisture differentials
Moisture differentials
  • Moisture transference from the verso via joints.
  • Higher moisture content = stickier surface
proposed monitoring
Proposed monitoring
  • Thermohydrographic measurement
  • Real time dust deposition (reflectance)
  • Environmental surface monitoring (Geletin lifters)
  • Thermal imaging
  • Colorimetric measurement of test samples